1.Emt fitting / strut clamp 2.Material: steel or Aluminium,bushing-zinc 3.Standard:USA 4.Cert.:UL 5.Size: ... " EMT Pipe fitting / EMT coupling / Strut Clamp1.Material:Steel or Aluminium also ok, bushing-Zinc 2.Grade:USA standard3.Cert.: UL4 ... sample,including size,appearance, material,with your logo,etc. steel / aluminium Strut Clamp