Loc-Line Vacuum Hose Component, Acetal Copolymer, Slide Valve, 2-1/2" Hose ID Valve with sliding gate to regulate the flow of air Fitting connects to Loc-Line modular 2-1/2" vacuum hose on both ends Acetal copolymer plastic has orange and blue colors, and resists corrosion and moisture Maximum operating temperature of 170 degrees F Compliant with REACH and RoHS standards for hazardous materials