You are bidding on 5 Spring Clips.<br> These items can be used in square or round tubes that are put together in a telescopic design.<br> These items are made of Manganese Silicon Spring Steel, which will resist stretching or losing its spring following rigorous use.<br> Not easy to rust.<br> size refers to button diameter<br> 4/5/8/9 MM single pin buttons.<br> 4/6/8/9 MM single pin (solid) buttons.<br> 6/8 MM double pin buttons.<br> 6/8 MM double pin (solid) buttons.<br>