PRODUCT FEATURES Viton o-rings are designed to wear longer and accept higher heat than Buna-n o-rings. Reviews FEATURED PRODUCTS 3/8" Couplers (25) Pack Buna O-Rings $5.21 Add to Cart 1/4" Couplers (25) Pack Viton O-Rings $10.89 Add to Cart Other 22mm Screw Coupler Buna O-Rings $18.38 Add to Cart 1/4" Couplers (25) Pack Buna O-Rings $4.90 Add to Cart