AEMC Instruments 2135.37 Test Kit for 4-Point Testing, Kit (Carrying Bag, [2] 500 ft Color-coded Leads on Spools (Red/Blue), [2] 100 ft Color-coded Leads (hand tied-Green/Black), [1] 30 ft Lead (Green), [4] 14.5? T-shaped Auxiliary Ground Electrodes... Replacement for #100.525