British screw type earth clamp200A 300A500A 600A 1. 50pcs/ ... 20cm 2. Material: Brass or Stainless st screw type earth clampBritish screw earth clamp 200A 300A500A 1. 50pcs/ctn ... 20cm 2. Material: Brass or Stainless steel British screw earth clamp 200A 300A500A 1. 50pcs/ctn G ... ,Brass material,American,Italian,Holland,Japanese type and other models150A, 200A, 300A, 350A, 500A, 600A screw type earth clamp