Some of the GSI I think are refillable. When I went through the exercise of looking for a tube for my DIY laser it came down to RECI and EFR. I ultimately went with RECI, mostly because it was easier to get.
Some of the GSI I think are refillable. When I went through the exercise of looking for a tube for my DIY laser it came down to RECI and EFR. I ultimately went with RECI, mostly because it was easier to get.