Product external size: 47 * 27MM (outer height * outer diameter) Product inner size: 30 * 17MM (inner height * inner diameter) Net weight: 25.5g Packing information: opp ziplock bag packaging, 46 * 24 * 20CM, 500 pcs per carton, gross net weight: 13.5KG / 13KG Product color: various colors or according to customer specified color production Product LOGO: Can do white laser laser or print various colors. Product use: It can be put in tablets or silicone earplugs, etc., and can also be used as a key pendant. It is fully functional and very convenient to carry. It is suitable for hunting, fishing, camping, adventure, wild lifesaving and other outdoor activities or home use.