The high temperature 2-Ply reinforced silicone elbow coupler is designed to connect to a (4 x 3)OD tube. Standard stainless steel worm-gear #044 and #064 worm clamps provides tight connections, durability and is corrosion resistant 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