... quality and competitive price. 3. different types. TOMA noiseless tubular motor for roller shutterSpecification:1) Dia.: 35mm, 45mm, 59mm, 92mm2 ... ) Mechanical limit switch/Electronic limit switch is optional. Tubular motor with built-in receiver inside is optional.6) Warranty: ... double brakes, increase 100% of braking ability.4. Normal motor bracket: Adopt three-leg supporter structure, which is easy ...