Made in USA. This Pure Stealth Straight #10 O-Ring x 5/8 Heater hose is designed to be used in conjunction with our Pure Stealth Braided 5/8 Heater Hose, our Pure Stealth Braided Molded Heater Hoses or any standard 5/8" heater hose. When using our Pure Stealth Braided Heater Hose, we suggest using Gates PowerGrip Heat Shrink hose clamps for a nice clean look.