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The high quality C and D Valve Co Brass Valve Core Tool (CD3813 ) includes valve core tool, container, and three valve cores. The Brass Valve Core Tool has compact knurled design and is Brass. Please be aware that it is recommended to use saftey equipment and to disconnect the appliance from all utilities prior to any service or repair. Please refer to your owners manual to confirm part numbers and for instructions as some repairs require a trained service professional to complete.