... -A-1 type series silencer, the nipple is nickel plated . SEB-A-1 Sintered and Plate The Nickel silencerMaterial:BronzeItem Code:SEB-A-1-6,SEB-A ... of products can be used on the equipments in order to reduce the noise and filtering the dusty or the air or oil or water ... 's OK,Our products mainly used in many large equipments, and be used for refuse the dusty,oil,air,and anyother materials ...