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Product Name: Convoy L4 DIY 18650 Extension Tube
Function: 1x 18650 battery to 2x 18650 battery exchanging tube
Diameter: 26mm
Material: Aluminum alloy

Suitable for: 


Convoy L4 XM-L2 1000LM Dual-switch Tactical Flashlight


https://www.banggood.com/Convoy-L4-XM-L2-1000LM-Side-Switch-LED-Tactical-Flashlight-p-921628.html
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