This is a Hitec servo that will work with all modern radio systems including Futaba J, Hitec, JR and Airtronics Z. FEATURES: NEW Heavy-duty resin gear train Nylon bushing 3-pole Ferrite motor INCLUDES: One Deluxe Standard servo with nylon bushing. One white small X-shaped servo horn. One white adjustable servo horn. One white offset straight servo horn. Four brass eyelets. One white plastic wheel servo horn. Four black rubber vibration isolators. Four M2x14 mounting screws. REQUIRES: Universal S/JR/Airtronics Z SPECS: Speed: 0.19 sec/60° at 4.8V Speed: 0.15 sec/60° at 6.0V Torque: 42.00 oz-in at 4.8V Torque: 51.00 oz-in at 6.0V Length: 1.60" (41mm) Width: 0.80" (20mm) Height: 1.40" (37mm) Weight: 1.5oz (43g) kpm10/28/02 COMMENTS: Gear set: HRCM5003 ir/kh Horn set: HRCM6315 NOTE: This is a non-ball bearing servo. updated ldt 4/26/03