About this item Durability: The natural KONG Classic red rubber formula is created to be durable for lasting chew, chase and fetch sessions Great For Stuffing: The patented KONG Biscuit Ball is strategically designed with four bone shaped holes to be stuffed to extend play time Mentally Stimulating: The mind-occupying treat challenge stimulates your dog’s natural instincts and encourages interactive play. Increase the challenge by stuffing the ball in multiple locations with KONG Easy Treat and Snacks Large Dogs: Made for large dogs size 30-65 lbs (13-30 kg) Made in the USA.