Specifications<br>1 steel main material, environmental protection ABS, PP materials <br>2 with screw, easy to install <br>3 pulley design, easy effort <br> <br>1 steel main material, environmental protection ABS, PP materials<br>(2) with screw, easy to install<br>3 pulley design, easy effort<br>4 white box packaging<br>5.TUVGS Certification<br><br>