8.704-037.0 O-Ring/Backring Seal Viton 13.9 X 10.2 ships factory direct right to your door. ADDITIONAL PRODUCT NOTES: Viton O-Ring / Back Ring Seal for Twist Seal Couplers, 13.9 x 10.2 8.704-037.0 model number - 10.4010.01, temperature - 302 Degrees, 109287, 87040370,