Tired of having to submerge your computer in water so you can see through the gauge protector? Once your gauge protector gets scuffed and scratched enough you can hardy read it on the surface between dives, it still protects the computers crystal, but if you can't read the computer between dives it time to replace it. The gauge protector is designed to protect the Mares Puck Air Computer (see SKU's: MRSPAC, MRSPACC) from scratches, abrasions and harmful UV rays. Its protective lens is optically clear and installs easily over the computer face. Replacement gauge protector makes a great save-a-dive-kit item.