... for water pump Weight: Approx.70g Application: Air Pump/ dia. 27.7 x 37.8 The models we list below are part ... .in 1mm=0.039in 1g=0.035ozCruise control DC motorDimension: φ 27.7 x 37.8 L. shaft O.D. 2.3 mmBasic ... Structure of Chengfang Motors2-pole statorSr ferrite permanent magnet3, 5, 7, 8, 9, 12,16 slots armatureSilicon-steel lamination with epoxy ...