Used SERVO-TEK SB-740A-2 SERVO-TEK SB - DC Tachometer Generators 7V/1000RPM Encoder ServoTek DC Tachometer Generators Out of stock Price $204.62 USD Ask availability : SB-740A-2 SERVO-TEK SB - DC Tachometer Generators 7V/1000RPM Encoder ServoTek