Nylabone

Nylabone is made from pure virgin nylon which is annealed after
moulding, resulting in a therapeutic chew device which is strong,
safe and 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 and gums and 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.