1.5" dust collector filter valve 1.World class quality diaphragm 2.Casting Aluminum valve body 3.ISO9001:2008 Dust collector filter ... AirOrifice: (25mm, 40mm, 50mm, 65mm, 76mm are available)Joint size: (1", 1-1/2", 2", 2-1/2", 2", 2-1/2", 3") Product Information1. Feature: ASCO series, copy, same size with ... further information about the dust collector filter valve. d 1.5" dust collector filter valve