Wilkins: 2 1/2" - 4" - Check Rubber Repair Kit for a:
• 2½" - 4": 350A / 350AST / 375A / 375AST
• 4": 350 / 450 / 450ST / 375 / 475 / 475ST / 450STDA / 475STDA
Kit Includes:
2 Check Discs, 2 Check O-Rings, 8 Poppet Bolt O-Rings, 2 AST Check O-Rings