Spare filters (x6) and Air Filter Removal Tool for removing the air filter on your L&B altimeter.

While the L & B altimeters are water-resistant, if they become wet after a dunk in anything but clean water (including salt water and after accidental swims in the swoop pond..) you MUST replace the Air Filter.

Replacing the filter is easy, but does require the Air Filter Removal Tool. Attempting to remove/replace the filter without the tool is NOT advisable and could damage your audible/altimeter.

Compatible with:

• Viso
• Viso II
• Viso II+
• Optima
• Optma II
• Solo
• Quattro

The Stella, Altitrack, Ares II and Protrack II have the filters built in to the battery cover.