Products： 1. Passing the international s strict test. 2. Bullet jump fixed clip， you can easily smooth your milk mouth and clutch your garment. 3. Design of the fastening ring， button down the milk mouth， let's go out when we "re doing something， prevents the loss or dirty soothing of the milk mouth. Product quality： Roster： Remaining (-10℃~ + 70℃) Back clip： Grindle (-10℃~ + 90℃) Milk mouthed： Grade (-10℃~ + 110℃)