Marshall Pet - Fp-089 Ferre Bell Collr-Red & Blue Designed To Fit All Size Ferrets.The Collar Is Fully Adjustable With Quik Snap Buckles For Easy On/Off.Bell Enables You To Know Where Your Ferret Is At All Times When Out Of Cage Label Instructions: Quick snap buckle.recommended for use outsid of cage.specially designed to be slip free and fully adjustable tested approved and recommended by the naiton s #1 ferret breeder. Ingredients: Durable 3/8 flat nylon with a quick snap buckle.