A neater/stronger stopper. Instead of tying a knot on the inside, you pass a line through and around the stopper to form a loop, finished with a splice or knot. The stopper always stays in place and cannot slide along the line. The stopper for 4mm rope has a 24mm diameter but other sizes can be printed such as the 5mm which has a 30mm diameter or 3mm (18mm diameter).

A stopper designed to work with two ends of elastic or cord. Can be made in a number of sizes - 4mm cord and 5mm cord are the most common. The 4mm stopper is 25mm wide and the 5mm stopper is just under 32mm wide.