HomeHPLC - Mass SpecWB446WB446 WB446 Add to quote This product is already in your quote request list. Browse the list Description Description WB Scientific Part WB446 OEM Part 003403 Models 3200, 3500, 4000, 4500, 5500, 6500 Description: O-Ring (3/16″ X1/16″, Vitonâ„¢)