' Sheet Metal Duct Adapter, Antistatic, Hose Inside Dia. (In.) 2-1/2, 3 In., Acetal Copolymer , For Use With Vacuum Hose Systems in Soldering, Wet Grinding, Machining Applications Especially Mist, Graphite and Particles, Chemical Odors and Fumes except Acids and Woodworking Applications '