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This Emitter (the part where the light comes out) is made to connect with the other modular lightsaber pieces that you will find in my shop. This part, like my other modular lightsaber parts is sized to accept a small flashlight inside like the one found here: https://www.harborfreight.com/3-12-in-Mini-Flashlight-69111.html
This is a large Emitter that sticks out over the handle to privide both a different look and feel to the lightsaber it is added do. This Emitter is fashioned after a classic broadsword and is one of very few pieces that is not cylindrical.