Ordering Description Product number Description: Tweco Roto-Ground RG-640 Ground Clamp Device (2000A, 6-4/0, 3 Head) Rotary, Copper Alloy Product number: 9250-1164 Description: Tweco Roto-Ground RG-440 Ground Clamp Device (1500A, 4-4/0, 2 Head) Rotary, Copper Alloy Product number: 9250-1144 Description: Tweco Roto-Ground RG-240 Ground Clamp Device (800A, 2-4/0, 1 Head) Rotary, Copper Alloy Product number: 9250-1124 Description: Tweco Roto-Ground RG-230 Ground Clamp Device (600A, 2-3/0, 1 Head) Rotary, Copper Alloy Product number: 9250-1123 Description: Tweco Roto-Ground RG-140 Ground Clamp Device (400A, 1-4/0, 1 Head) Rotary, Copper Alloy Product number: 9250-1114 Description: Tweco Roto-Ground GCRG-140 Ground Clamp Device (400A, 1-4/0, 1 Head) Rotary - C, Copper Alloy Product number: 9210-1314