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Re: Light source

Laser pointer kit - 4 mw adjustaael focus uses 2 AAA cells
easy to assemble $24.95 each in units of 12 $39.95 units of 1
same price for assembled (but < 3 mw) beam diameter 3.5 mm
Omnitron Electronics Saddle Brook NJ 800-379-6664 fax 201.703-9804