I have 1 Refurbished M3 ARK With Tonometry TONOREF II For Sale. Instrument is in excellent working order. Priced to sell. Instrument was preciously well taken care of in a small optometrist office. You can call or text me directly at 925-250-7330 if you have specific questions. You can email me at protech2500@aol.com. Thanks, Chris.

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