emergency brake ,tubular motor accessories safety brake,protection device, Act as pressure transmission for tubular motor Type :RSB-1-18/FUpon demand,the bore can be supplied as follows:Square 13*13(mm),Square 16*16(mm),Square 17*17(mm),Square 18*18(mm),Torque Max :96N.mIntercepting moment Max :198 N.mOperation speed Max :22M Rolling Shutter Operators(Saftey Brakes)