Name:6v15kg-cm digital servo, size:a:40.2mm b:20.1mm c:38.8mm d:48.0mm e:10mm, weight:56g ±0.2(1.46oz), gear type:titanium gear, speed:0.10sec/60º at (6v) 0.12sec/60º at (4.8v) Torque:15kg.Cm.At(6v) 13kg.Cm.At(4.8v) the features:waterproof, plastic case, resist heat and corrosion, all aluminium hull, easy to eliminate heat,adopt high quality coreless motor. Size:a:40.2mm b:20.1mm c:38.8mm