The Lockable Cable Window Restrictor is a simple to fit device that limits the distance a window can open, perfect for home & commercial safety. When the cable is in place the distance the window can open is limited, by using the key the cable can be removed from one end and the window can be opened fully. Suitable for most types of windows and small doors. Perfect for home, public and commercial applications Designed specifically with child safety in mind. and high quality /Universal window and door restrictor Colour:A: black Material:Stainless steel+ABS Package Contents: 8 x Window Door Restrictor 1set x screw accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.