Bio-Rad is the oldest and original Tono-Pen, manufactured over 30 yrs ago. The device is a very basic model. They’re expertly refurbished by on site professionals. It comes with a 90 day warranty.

Each refurbished instrument is tested for calibration and reading accuracy.

Refurbished devices are our specialty and we take great pride in the quality of our craftsmanship serviced by onsite professionals.

We provide FREE Priority Express shipping and this refurbished Pen comes with:

· Deluxe Case
· Extra Batteries
· Metal Stylus
· Maintenance Instructions
· Operation Instructions
· 90 Day Warranty