This remote pressure switch is especially designed for -501B Flashlight With this switch, you are able to line control your Torch 100% Brand NewFunction: Remote Pressure SwitchCompatibility Models:-501B LED FlashlightSuit for flashlight which has the same metal case designSize: 3cm x 2cm x 2cm - 1 18inch x 0 78inch x 0 78inchDiameter of Remote Pressure Switch: 23 5mmMaterial: Aluminum,plasticColor: BlackNotice: Before you bid this item, please make sure this switch fits your torch, because some versions of the torch in the market might be differentPackage Contents:1 x Remote pressure switch for 501BOnly the above package content, other products are not included Note: Light and different displays may cause the color of the item in the picture a little different from the real thing The measurement allowed error is +/- 1-3cm