Features: Model：85BYGH450A-001；85BYGH450A-002 ；85BYGH450B-002；85BYGH450B-004；85BYGH450B-00885BYGH450C-001；85BYGH450C-012；85BYGH450D-002；85BYGH450D-007 Step angel ( ° ): 1.8 Motor Length L(mm): 75~151 Rate Voltage(V): 1.9~7.8 Rate Current (A): 2~6 Phase Resistance ( Ω ): 0.43~3.9 Phase Inductance (mH): 2.5~22 Holding Torque (N.m): 2.1~11.2 Lead Wire (NO.): 4/8 Rotor Inertia (kg. c㎡): 1.4~3.6 Motor Weight (kg): 2.3~5 We are specializing in Stepper motor, Brushless DC Motor, Stepper Geared Motor, Power Supply, Control Board and the Control System.Our company has powerful technology, mature technics and complete testing equipment. And we have obtained ISO9001:2000 certification, CE certification and all of our products conform to RoHS requirements. Please join us! Working together, growing together! Changzhou Wantai Electrical Appliance Co., Ltd Kaly MSN: [email protected] Skype:kalyred My web site:http://www.wantmotor.com The link of my store: http://www.dhgate.com/wholesale/products/ff8080813b45a570013b5f450b8b04c8.html#prod-seller-store