ALTITRACK MOUNTING PLATFORM - Replace your mounting platform if it becomes lost, worn or for a personalised fit. You can choose a different size platform to personalize how it sets on your hand or mount:
FLAT- For mounting on flat surfaces such as altimeter pillows or mudflap mounts
STANDARD- Fits most hands comfortably for the best ergonomic fit and placement
XL- This mount is for small hands so that the Altitrack sits at the appropriate angle and position on the hand for better viewing.