Replacement Metal Nuts for Airline Approved Travel Kennel Replaces standard black plastic wing nuts Does not include bolts Solid Metal Nuts fit existing Bolts on Sky Kennel, Vari Kennel and all Petmate Aspen Kennels Airline Required, Airline Approved Easy to install just remove Black Plastic Wing Nuts and Replace with Our Special Metal Nuts Save Money $ - by only purchasing replacement Nuts to fit your NEW Kennels Existing Bolts