Hiemal
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5pcs 12*30mm Focusable Adjustable Housing/Shell for 5.6mm TO-18 TO18 Laser Diode | eBay
The only downside is that they don't have the little focus adjust ring with them... But at $1.89 each it can't be beat price wise!
The only downside is that they don't have the little focus adjust ring with them... But at $1.89 each it can't be beat price wise!