The motor features a 3.2mm hardened steel shaft, dual ball bearings, and has 3.5mm gold spring male connectors already are tapped for 3mm (M 3) s crews. Similar to Welgard A2212-13, AXI Gold A2212/26, Welgard C2830-12, E-Flite Park 400. Great replacement motor for a 1/2A Texaco engine. IO TEST DATA Volts Amps RPM 7 0.6 7380 8 0.65 8460 10 0