1.Free moving,wearing resistant,high temperature resitant 2.Non-deformation,low noise,east to assemble and dismantle Model parameters and installation dimensions instructionsSmall SeriesChain link Open,Semi-enclosed: Removable unilateralTowlineHIWIHOWOPCS/MeterRAssembly Type 18 Serise 181823.53030 028,038,048Open2524.53730Open/ Semi-enclosed3723.549.530