1 RPM Gear Motor Torque @ Max Efficiency:619 oz-in.@12VDC/ Torque @ Stall: 2,995.2 oz-in.@12VDC .240 (6mm) Diameter Shaft/ Shaft size: 6mm (0.236) Dia. x 0.715"L Gear ratio: 3000:1/ Gear size: 1.45"Dia. x 1.23"L Insulation resistance: 10 Mohm/ Dielectric Strength: 300VDC DC reversible motors