The high temperature 2-Ply reinforced silicone elbow coupler is designed to connect to a (3-7/8 x 4-1/4)OD tube. Standard stainless steel worm-gear #064 & #072 clamps provides tight connections, durability and is corrosion resistance for industrial, commercial, truck, off-road and racing applications. Product Features:2-Ply Reinforced High Temp SiliconeCoupler Hose Allows For Expansion/Movement/VibrationStainless Steel Worm-Gear Clamps Provides Tight ConnectionsWorm-Gear Clamps Provide Durability/Corrosion Resistant