The Lezyne Metal Kit has a aluminum case and rubber end caps that make this patch kit durable and waterproof. The glueless patches conform to inflated tubes with an aggressive adhesive making them a permanent repair. The patch kit instructions have an adhesive backing to serve as an emergency tire boot. The kit includes a stainless steel scuffer. Patch refill kits and countertop POP boxes are also available. scuffer, 6 glueless patches, 1 tire boot