1PCS X Nema34 Planetary Reduction Ratio 1:6 Planetary can develop the torque of motor and cut the speed of motor effectively ; It will help motor to take much more load,bigger torque. Parameter: Reduction Ratio: 1:6 Input Shaft: 14mm 5mm key (If your motor is 12.7mm ,please tell us) Input Speed: 3000rpm Output Shaft: 16mm (5mm key) Output Torque: 40Nm Efficiency: 90% Body Length: 80mm Backlash: 18 arcmin Drawing Pictures: If your motor shaft is not 14 mm,please send us the drawing pictures.Thank you Show Room: Payment: We accept paypal credit, bank transfer, western union etc. Payment must be made within 7days calendar days of the auction end time. Problem and Feedback: PLEASE DON'T leave any negative feedback before you contact us. We are sincere and helpful vendor , we are able to try our best to resolve issues of you. Your satisfaction is very important for our store, so please contact us before you want to leave a negative feedback. Thanks very much in advance. Refund: If you are NOT SATISFIED with our package like the products is damage, please do not sign it and contact us immediately. If it is possible, please take some photographs or make a small video about it. It may help us to solve the problems. Note: We can produce the product according to our customer's design. If you wish anything is awfully special, please touch us about it. We are keen to help you about it.