This 9cm wide black metal Extension can simply be added to the Safety Gate to help fill the desired gap. Dreambaby Chelsea Gate Extensions can be added to Dreambaby Chelsea Standard width (Model F160) and Chelsea Hallway width (Model F170) Security Gates to extend the width for extra-wide openings to help make your home as safe and secure as possible for your little ones. Safety gate features: This extension is 9cm wide. Ensure you measure the opening before deciding on your dreambaby safety gate and width of extension. Simply attach the extension to your gate before installing. Use the silver metal rod/pin to joing the extension to the metal safety gate. Adjust the 4 tension bolts if necessary so the gate with extension fits the desired space. Gloss durable metal, easy to clean. 2 way opening. 1 handed opening and locking. Step over bar. Wide walk through section. Height 75cm. Fits openings from 9 to 9cm. Extensions included. General information: Minimal assembly. Manufacturers lifetime against defects only guarantee.