Rob Allen Constrictor Line/m
The Rob Allen constrictor line is a black polyester braid and is sold by the meter. We use this to tye the bridle balls in to the rubber when making up new speargun rubbers. After the bridle is pushed in the the required rubber, to prevent it from coming out when under stress, the constrictor cord is wraped around the end and tyed off using a vice or 2 pairs of pliers.