Oetiker 153000035 Stepless Ear Clamp, One Ear, Clamp ID Range 4.1 mm (Closed) - 5.1 mm (Open) (Pack of 100) Clamp ear is dimpled for increased clamp force Mechanical interlock for secure closure and better corrosion resistance than a spot-weld Thin-walled insert ring for near-uniform compression around the whole circumference of the clamp Suitable for applications involving soft or hard rubbers and plastics Stainless steel for resisting scaling and corrosion