... plated finished3. Size:1/2"x1/2"3/4"x3/4"1"x1"2.Material:Brass 3.Size:16-1/2",20-1/2" 4.Certificate:ISO9001 ... 1.1 1.416 16,0 16,31,5 1,5 1,816 16,0 16,31,8 1,8 2,120 20,0 20 ... ,31,9 1,9 2,220 20,0 ... diameter mmWall thickness mmNominal Min. Max.Nominal Min. Max.16 16,0 16,32 1,9 2,3518 18,0 18,32 1,9 ... 2,3520 20,0 20,32 1,9 2,3520 20, ...