Specifications include, but are not limited to: 12-B C.T. Base, 6 terminal-single phase, C.T. base. Bases are to be Milbank #UC1299 XL 6T Meter Socket with Hub Opening. Vendor to maintain minimum of 5 units in stock. (GUC Stock #205650) II 14-B Meter Bases, prewired with test switch, 13 terminal 20 amp, hub plate MTD; 1 position-steel-ringless Type 3R-600 VAC. Bases are to be Durham #1008409 or Meter Devices #602-3010C13-1136 MK. Vendor to maintain minimum of 5 units in stock. (GUC Stock #205670) III 19-B Meter Bases, 4 term, 320 amp, large hub plate MTD; 1 position-steel-ringless, UL Type 3R-600, VAC-LVR bypass, single phase meter base with 6-ADR35-21 lugs installed per base, with line and load labels. Bases are to be Durham #1009891 320A. Vendor to maintain minimum of 5 units in stock. (GUC Stock #205980)