The Flip Front Adapter is constructed with durable nylon material and is made with 2 lift-up finger handles for added convenience. Converts your favorite Sellstrom and Jackson Safety brand passive welding helmet to a flip front style Passive filter plate measures 2” x 4-1/4” Adapter comes with all the necessary parts for assembly: screws, polycarbonate cover plate, filter gasket, and back spring Ideal for Sellstrom 280 and 290 series welding helmets Easy to install and remove