Vent Valve Vacuum Switching Valve Inlet Inside Diameter:0.1 In. Length:2.69 In. Material:Steel and Plastic Mount Hole Diameter:0.25 In. Mount Hole Quantity:1 Package Contents:1 Vacuum Switching Valve Port 1 Outside Diameter:0.17 In. Port 2 Outside Diameter:0.17 In. Port Quantity:2 Terminal Quantity:2