Professional Process: resilient nylon material, can withstand harsh and weather conditions, service life, professional process, stable performance. of Use: Enhance the of use, can withstand greater work, improve performance, that the experience of use is enhanced, more optimized ability, suitable for arm circumference in 172?235mm or 6.77?.25in . Easy to Carry: You can always carry around when you need it, when you do not need it can also be easily stored, will not take up too much space. Spare Flashlight Use: Dive flashlight cover for spare flashlight and holding flashlight. Put the flashlight on your arm, can help your palm to complete other tasks, applicable to many flashlights. Applicable Scenarios: Can be applied to diving, outdoor, cave exploration and other kinds of tube diameter suitable for flashlights, wrist cover, suitable for flashlight diameter in 25?30mm or 0.98?.18in .