specification:Model: RS-550 Length: about 57mm Diameter: about 37mm Shaft length: about 12mm Gear diameter: about 9.6mm Motor mounting hole distance: about 25mm Motor gear: 14 teeth/ Rated voltage: 14.4v The 14 teeth suitable for all models are as follows: 14teeth DC 12V motor for MAKITA 629817-8 6270D 6227D 6270DWE 6271DWE 6271D 6270DWPE motor 14teeth DC 12V motor for MAKITA 629817-8 6270D 6270DWE 6271DWE 6271D 6270DWPEW cordless drill screwdriver 14 teeth DEWALT 10.8V 12V for DCD700 DCD710 DCD710S2 DCD701 N075847 N446251 N432948 N038034 DCD710C2 DCD710DV DCD710D2 14teeth DC14.4V instead of MAKITA 629819-4 629875-4 6381D BDF343 6280D 6280DWE 6281DWE 6281D MT070 6280DWPE 6280PWPE3 14teeth DC 14.4V is suitable for BOSCH GSR14.4-2 cordless electric drill driver electric screwdriver power tool 14teeth DC14.4V is suitable for MAKITA 6228DWE 6228D cordless drill screwdriver 14teeth DC 14.4V for MAKITA 6280DWPE3 6280D 6280DWE 6281DWE BDF343 6281DWPE MT070 6281D 14teeth DC 14.4V DF347D BDF343 for Makita DF347DWE DDF343 and many more Colour:Silver Material:metal Package Contents: 1* Motor Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.