1.Name:worm drive hose clamps 2.Material: stainless steel 304,316 3.type: with and without perforation 4.spec.:12.7/12 mm. worm drive hose clamps:1.Name:worm drive hose clamps;2.Material: stainless steel 201,301,304,316;3.type: with and without perforation;4.spec.:12.7mm and 12.0mm;5.standard: DIN and SAE.