Zipper extension: 3 meters long silver-colored metal ball chain with 10 matching connectors; Good compatible with replacing the molded handle or extending the zipper. Dead diameter of the roller blind zipper: 4.5 mm/0.18 (Note: Please allow a slight dimensional deviation due to manual measurement); With 10 matching connectors attached, which is convenient. Applicable scene: Mainly suitable for ceiling fan chain, high ceiling lights, in the ceiling for ventilation, as a curtain zipper, bottle cap hanging chains and many other places. Note: 4.5 mm diameter ball chain is suitable for replacing the ball chain on roller blinds and blinds; 3.2 mm diameter ball chain is not suitable for replacing the ball chain on roller blinds and blinds; Make sure the replacement diameter of the ball size of the zipper when purchasing. Adjustable length: Cut the desired length of the zipper to install it in the places, which is convenient for your daily life.