Spear & Jackson SJ-RLB-OY Tyzack Rubber Line Blocks (Box of 24) The Spear & Jackson SJ-RLB-OY is a Merchandiser Box of 12 pairs of Tyzack Rubber Line Blocks (6 pairs in orange, 6 pairs in yellow). For holding braided lines securely in place. Features: Rubber moulded blocks are angled so that when under tension they square up to a corner Rubber surface and grooves help to prevent slippage Highly visible fluorescent colours - easy to see, not so easy to lose Specification: 12 pairs of moulded rubber blocks (6 pairs in orange, 6 pairs in yellow)