(Traid) Use with "gomer" bull or cow to mark animals in heat. Nylon straps (5000 lb. test) adjustable with non-slip steel buckles for secure. Special rubber tubing is installed on back strap to prevent cutting or chafing. Stainless steel ink reservoir holds enough ink for 50-60 mountings, or 25-30 cows, depending on the mating characteristics of the individual bull.