Nylabone Nylabone is made from pure virgin nylon which is annealed after moulding, resulting in a therapeutic chew device which is strong, safe & very durable. The bristle-like projections that are raised on the surface of the bone as it is chewed massage the surface of the teeth & gums & help to prevent plaque from forming. Choose the largest size your dog can comfortably hold in his mouth in order to derive the greatest dental benefit. Nylabone, Petite size 0018214001010NP101 Nylabone, Regular size 0018214001027NR102 Nylabone, Wolf size 0018214001034NW103 Nylabone, Giant size 0018214001041NG104 Nylabone, Souper size 0018214555193NS105 Nylabone Bone-Us Triple Pack, Regular size 0018214333333NT106 Nylaring, Giant size 0018214552048N204 Nylabone Wishbone, Regular size 0018214999058N213 Nylabone Wishbone, Wolf size 0018214999065N214