HITEC HS-645MG ULTRA TORQUE 7.7kg 0.24secThe powerful HS-645MG is one of Hitec’s most popular servos. It’s the perfect choice for those larger sport planes or monster trucks and buggies requiring a durable high torque servo. Featuring our unique M/P and metal gear train technology, the HS-645MG offers one of the strongest gear trains available in any servo. Detailed Specifications Motor Type:3 Pole Bearing Type:Dual Ball Bearing Speed:0.24 / 0.20 sec @ 60 deg. EnglishMetric Torque:106.93 / 133.31 oz.in (4.8v/6v) 7.7 / 9.6 kg.cm Size:1.59" x 0.77" x 1.48" 40.60 x 19.80 x 37.30mm Weight:1.94oz55.20g