American type worm drive hose clamp Size MS01A MS01B MS01D ... .7mm,W1,(12.7mm bandwidth, W1,all galvanized steel)MS01B---12.7mm,W2,,201ss/301ss/304ss.(12.7mm ... bandwidth ,W2, the screw is galvanized steel, others are 201ss/301ss/304ss)MS01D---12.7mm,W4 ... stainless steel 201ss/301ss/304ss),.According to the requirement of customers, other sizes and material are also available. American type worm ...