Package Content: 50 x Roller Blind Chain Connectors. Size: 4.5mm Color:Silver Package Content packaging: 50 spare clips for vertical ball chains. Connects the ends of the roller blind beaded chain cord together. Cost effective: no need to replace your existing bead chain. Simply reconnect each ball end using these useful replacement accessories. Easy to use: just determine the distance between the ball heads of the chain, then press it down with your hands. It can be easily installed and removed without tools. Wide Application: The roller blind chain connectors are suitable for all types of blind chain, you can use it for curtain rollers, romans , vertical blind chains, necklaces, bracelets, key chains, dog tag chains, etc. Size: 4.5 mm, because the chain connector is too small, please do not let children play.