This rearm kit is compatible with the Khimera dual flotation PFD model number MD7183. Use only Mustang Survival rearm kits. Use of other rearm kits may result in improper operation or failure to operate and will void the product's warranty. Regular maintenance can reduce the possibility of inadvertent inflation. For a maintenance schedule, refer to your owner's manual. You should rearm the inflator before the expiry date on the cap passes.