Purchase of this unit comes with everything to use as shown in the photo which is the base and the wheel. The clamp of it is sold separately($10 add on) if you want to convert int a table top clamp on light. To clean any Magnifier lens if it's just dusty , you simply need to use a moistened soft cloth with warm water (soft cotton, microfiber ) and gently wipe the lens surfaces.
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Answered by zep on Aug 20, 2020