Product Description NLL series Aluminium alloy strain clamps is suitable for aerial line up to 35kv,fixing Aluminium wire or steel core minium wire on the strain pole Areial insulation conductor and insularion aluminium cover are being used together action is insulation protection 1.The body is made of High-strength Aluminium Alloy 2. Smooth surface long servile life 3. Easy installation 4. No waste electric energy