Avoid costly repairs by replacing your old worn out Tono-Pen case insert. Your new insert easily installs in seconds! The number one cause for Tono-Pen malfunctions and repairs is the messy tiny particles from the old worn insert clogging up the Transducer. Over time this causes inaccurate readings, calibration issues and eventual repair or worst an un-repairable Tono-Pen.

Our insert material is Black Zote foam. One of the nicest foams in the industry. The blow agent used for creation is nitrogen, which makes the product have NO odor and excellent for case inserts!

Protect your investment and make your case "Like New" for just $39.95 with FREE Shipping!