100A Round Meter Base 1)Material: metal or copper 2)Size:1/2", ... requirementsSpecification Item Code No. Description Fix hub sizeSM-100-B1 Phase,100A,120/240Vac,4 jaw 1/2"SM-100-C1 ... Phase,100A,120/240Vac,4 jaw 3/4"SM-100-D1 Phase,100A,120/240Vac,4 jaw ... 1"SM-100-E1 Phase,100A,120/240Vac,4 jaw 1-1/4" 100A Round Meter ...