... competitive price. 3. different types. TOMA noiseless tubular motor for roller shutterSpecification:1) Dia.: 35mm, 45mm, 59mm, 92mm2) Torque: 3N.m ... , high strength, wear-resistant, easy hand operation.2. Normal limit screw rod: the unit composes of plastic or iron. TOMA limit ... screw rod: composes of brass, featuring high accuracy, resistant to wear, ...