Check the listing for details. 3" Silicone Rubber Gasket for Perforated Flasks Vacuum Casting Seal Pad. Color: Orange, Condition: New. Listed at 9.45 USD. SILICONE GASKET FOR VACUUM JEWELRY CASTING GASKET FOR 3" DIAMETER PERFORATED FLASKS VACUUM SEAL FOR FLASK & FLANGE ADAPTER High Grade Silicone gaskets are used during vacuum casting to seal perforated flask ring and casting chamber. The heat resistant Silicon material acts as a sealing layer between the hot flask and the casting chamber flange adapter. Gasket provides a good seal, allowing the vacuum to fully pull the molten metal into the flask. These gaskets are die-cut, have a thickness of 1/8” and come in various diameters to work with individual flask OD sizes. NOTE: Gasket ID is slightly larger than 3” to easily fit perforated flask into the casting chamber. The outside diameter has a wide surface area to assure a good seal. *** Buy quantity and save $$$ … as low as $7.56 SPECIFICATIONS: JETS Product #0304-230 - Material: Silicon - Flask Diameter: 3" - 76.3mm - Gasket Outside Diameter: 4-1/2" - 114.3mm - Gasket Inside Diameter: 3-3/8" - 85.7mm - Gasket Width: 9/16" - 14.3mm - Thickness: 1/8" - Made in USA Visit JETSINC. our ebay Store to see listings for many other Lost Wax Casting Supplies and Accessories, including Casting Investment Powder, Casting and Carving Wax along with a selection of many other Jewelers Equipment Tools and Supplies JETS INC. E2 614 CKP PA22