Loc-Line Anti-Static Vacuum Hose Component, Black 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 a black color and is made with an electro-conductive component to help reduce buildup of static electricity within vacuum hose Maximum operating temperature of 170 degrees F Compliant with REACH and RoHS standards for hazardous materials