{"product_id":"208-3366-050-five-inch-column","title":"Sample Preparation Columns, Polystyrene, 5\" with Coarse Filters (90-135 µm), Non-Sterile, 200\/Bag | Caplugs® Evergreen","description":"\u003ch1\u003eCaplugs® Evergreen 5\" Sample Preparation Columns, Polystyrene with Coarse Filters (90-135 µm), Non-Sterile, 200\/Bag\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eCaplugs® Evergreen 5\" Sample Preparation Columns\u003c\/strong\u003e are molded from clear polystyrene and fitted with integrated coarse frits rated at 90-135 microns. Designed for gravity-flow chromatography, resin loading, and bench-scale purification, these 5-inch columns retain particulate media while allowing free buffer flow for reproducible bind-wash-elute workflows.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eSample Preparation Columns (gravity-flow)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\/Size\u003c\/td\u003e\n\u003ctd\u003e5\" column length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolystyrene (PS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGraduation\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter\/Frit\u003c\/td\u003e\n\u003ctd\u003eCoarse filter, 90-135 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e200\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGravity-flow purification of proteins, peptides, and antibodies\u003c\/li\u003e\n\u003cli\u003ePacking affinity, ion-exchange, and size-exclusion resins for small-scale prep\u003c\/li\u003e\n\u003cli\u003eSolid-phase extraction and sample cleanup prior to HPLC or LC-MS\u003c\/li\u003e\n\u003cli\u003eDesalting and buffer-exchange workflows in molecular biology\u003c\/li\u003e\n\u003cli\u003eManual screening of resin batches during method development\u003c\/li\u003e\n\u003cli\u003eEducational and teaching lab chromatography demonstrations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003elabsupplies.com is an authorized Caplugs® Evergreen dealer shipping from US inventory, and these columns are Made in USA. Each bag carries a lot number to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our procurement team for volume quotes.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat particle size does the coarse filter retain?\u003c\/h3\u003e\n\u003cp\u003eThe integrated frit is rated at 90-135 microns, which retains most standard chromatography resin beads while permitting unrestricted gravity buffer flow during bind, wash, and elution steps.\u003c\/p\u003e\n\u003ch3\u003eAre these columns sterile?\u003c\/h3\u003e\n\u003cp\u003eNo. These columns ship non-sterile. If your protocol requires sterility, autoclaving is not recommended for polystyrene; use a validated chemical or filtration step compatible with PS instead.\u003c\/p\u003e\n\u003ch3\u003eWhat is the column length and material?\u003c\/h3\u003e\n\u003cp\u003eEach column measures 5 inches in length and is molded from clear polystyrene (PS), allowing visual monitoring of resin beds and flow during sample preparation.\u003c\/p\u003e\n\u003ch3\u003eHow are the columns packaged and sold?\u003c\/h3\u003e\n\u003cp\u003eThey are sold in bags of 200 columns per pack. Each bag is lot-numbered for traceability and the listed price is per 200\/Bag pack.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Caplugs® Evergreen 5\\\" Sample Preparation Columns, Polystyrene with Coarse Filters (90-135 µm), Non-Sterile, 200\/Bag\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"Caplugs® Evergreen\"},\n  \"sku\": \"208-3366-050\",\n  \"countryOfOrigin\": \"USA\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"135.89\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"seller\": {\"@type\": \"Organization\", \"name\": \"labsupplies.com\"}\n  }\n}\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\"@type\": \"Question\", \"name\": \"What particle size does the coarse filter retain?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The integrated frit is rated at 90-135 microns, which retains most standard chromatography resin beads while permitting unrestricted gravity buffer flow during bind, wash, and elution steps.\"}},\n    {\"@type\": \"Question\", \"name\": \"Are these columns sterile?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. These columns ship non-sterile. If your protocol requires sterility, autoclaving is not recommended for polystyrene; use a validated chemical or filtration step compatible with PS instead.\"}},\n    {\"@type\": \"Question\", \"name\": \"What is the column length and material?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Each column measures 5 inches in length and is molded from clear polystyrene (PS), allowing visual monitoring of resin beds and flow during sample preparation.\"}},\n    {\"@type\": \"Question\", \"name\": \"How are the columns packaged and sold?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They are sold in bags of 200 columns per pack. 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