... -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-1 ... -8,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 ...