Perma Couplets Perma is one of the strongest materials on the market, constructed of two layers of polyester fibers imbedded in rubber. Top surface wipes clean, is soil and odor resistant and water repellent. Can turn any lead into a multiple lead. Allows up to 12" between dogs. Steel-welded 1.25" O-Ring. Brass bolt snap. SKU# 145PB                                                      Our price 8.99 6/ 47.99