45 Degree 4 ply 5mm Thickness High Performance Elbow Silicone Hose Vibrant 4 Ply Reinforced Silicone Elbow Connector 4.5in I.D. 90 deg. Elbow (BLACK) Vibrant Performance 4 Ply 45 deg. Silicone Elbow Coupler, 1.5 Inch ID x Vibrant 4 Ply Reinforced Silicone Transition Connector 2.5in I.D. x 3 Universal 4 Ply Silicone 3.25" to 4" Coupler 45 Degree Angled Elbow Universal 4 Ply Silicone 3.25" to 4" Coupler 45 Degree Angled Elbow. Vibrant Performance Aramid Reinforced Silicone Couplers are hand wrapped and feature 4 ply reinforcement, which allows our couplers to be capable of withstanding extreme temperatures and heavy duty pressure conditions without swelling or bursting. All Vibrant Performance reinforced hoses meet or exceed SAE J20 specifications, are suitable for coolant service and are UV and Ozone resistant. Not suitable for oil or fuel service, although custom hose solutions are available for such applications. Available in straight sections, transition hoses, hump hoses, 45 and 90 deg. elbows as well as transition elbows, and in a wide variety of Hose ID sizing. Rated for temperatures ranging from 65 deg. F to 350 deg. F.