Mustang Survival 12" Belt Extender f/M.I.T. 100 - 2" Wide - Voids USCG Approval. This belt extender fits PFDs with 2" buckles and is compatible with our M.I.T 100 PFDs: Models MD2014 MD2015 MD2016 and MD2017. Will not fit inflatable PFD models with 1.5" or 1" webbing In Canada wearing a belt extender voids the Canadian ULC approval for the PFD. In the United States wearing the belt extender voids the US Coast Guard approval UNLESS the wearer has a chest size over 130cm or 52inches in which case wearing an adult universally-sized PFD with a clip-on body strap extension DOES NOT void the approval. Specifications for Mustang Survival 12" Belt Extender f/M.I.T. 100: Manufacturer: Mustang Survival Color: Black Features of Mustang Survival 12" Belt Extender f/M.I.T. 100 Color: Black Package Contents: Mustang Survival 12" Belt Extender f/M.I.T. 100 Mustang Survival MA7632: 12" Belt Extender f/M.I.T. 100 - 2" Wide - Voids USCG Approval