This bundle of 18 belt seats for swings comes at a discounted bulk rate which significantly reduces the cost of buying this many seats separately. With this many, you will likely have plenty of spares in case of the unlikely event that one of them is damaged or needs to be replaced. However, the steel insert reinforces the plastic, making these seats deceptively sturdy. They should have no problem withstanding years of outdoor weather conditions, in addition to frequent and rough use by kids. This is a straightforward seat design where children simply sit on the belt and hang on to the chains on either side of them. It is not recommended for very small children who might have trouble hanging on. Our D-Shackles make it as simple as possible to install these seats into your swingset. All seats in the box will come in your choice of black, blue, or green.