... ,SEB-A-1-10,SEB-A-1-15,SEB-A-1-20,SEB-A-1-25Thread Size:1/8",1/4",3/8",1/2",3/4",1"Thread Kind ... of products can be used on the equipments in order to reduce the noise and filtering the dusty or the air or ... zinc plated, that's OK,Our products mainly used in many large equipments, and be used for refuse the dusty,oil,air ...