uxcell Travel Camping Extension Tube Joint Adapter for Rechargeable Flashlight 18650 Battery Product Name : Flashlight Extension Tube;Total Size : 20 x 27mm/ 0.79" x 1.1" (L*D) Thread Dia. : 23.5mm;Material : Alloy Color : Black, Silver Tone Weight : 10g; Package : 1 x Flashlight Extension Tube Perfect flashlight for hiking, camping, hunting, fishing, targeted searches and general household use