Liquid Refill for Tri Electronics 24 Karat Gold Testers 

This liquid testing refill is compatible with the following electronic gold testers:

• Tri-Electronics GXL-24 (Only tester designed for the liquid refill)
• Tri-Electronics GT-4000  (Only tester designed for the liquid refill)
• Gebertech IGT-24  (Only tester designed for the liquid refill)

Warning: This refill is compatible ONLY with the testers designed for liquid refills. Your tester's pen probe should have a label reading: "For use with liquid solution only". Regular gel-based testers will NOT work with this refill!