Bullet Designs Inc. was established in Los Angeles, USA. It is the only officially authorized unit of Winchester ® Repeating Arms Company. The products are designed to collect various bullets (no gunpowder), cartridge cases, etc., and design various accessories Accessories, daily necessities, the style of their products have both the American masculine and the romantic character of retro feelings, has been well received since its introduction, and has been recommended by many fashion media magazines. The "40 Caliber 40 caliber bullet shell" is used as the pumping cap, and the cartridge shell is threaded, which can be used to lock the inflation nozzles of automobiles, motorcycles, bicycles, etc. Can also be used for other items with the same specifications of threads, or as shooting props, display accessories ... etc. -The length of the cartridge is about 2.1cm. -Comes in original box (4 pcs / set). * Do not use it for illegal purposes or modification, if you cause any legal problems or risks, you must bear it yourself.