Knurled flat mouth bellows made of corrugated stainless steel

1# for 13.5mm(3/8") stainless steel corrugated. 2# for 25mm(1") stainless steel corrugated. 3# for 16.8mm(1/2") stainless steel corrugated. 4# for 16mm(1/2") stainless steel corrugated. 5# for 20mm(3/4") stainless steel corrugated.