Supplier: DWK Life Sciences (KIMBLE) Description: These economical columns are constructed with borosilicate glass barrels, molded polypropylene end caps, and polyethylene bed supports. ,KT420400-1511PK,KT420401-1505EA,KT420401-0705EA,KT420400-0750PK,KT420400-2505PK,KT420401-1575EA,KT420400-1050PK.