Made with correct bends and curves for perfect fitment, Compatible with Subaru Impreza GC8 GF8 STI EJ20 WRX Turbo Thickness 4.5mm ,3-Ply Nylon for Strong Reinforcement Made of High Quality Silicone for Enhanced Strength and Durability Prevent and fix the coolant leaking and engine over heating problem caused by cracked, damaged or collapsed OEM rubber coolant heater hoses. Includes stainless steel industrial grade embossed hose clamps which would not cut thru the silicone hoses.