These are low profile replacement M8 Stainless Steel T-nuts for the any hydrofoil that uses the M8 T-nut, which just about all Tracked hydrofoils.  The low profile t nuts can be used in some foils that use M6 t-nuts as they are the same low profile.  These are low profile meaning they are thinner than stock brass T-nuts by about 2.2mm from top to bottom but STRONGER.  See the video below for some of the testing including breaking T-nuts in slow motion.  Sold each.

This is the dimensions of this part:

These are also available in M6 on a separate product listing. 

These are low profile replacement M8 Stainless Steel T-nuts for the any hydrofoil that uses the M8 T-nut, which just about all Tracked hydrofoils.  The low profile t nuts can be used in some foils that use M6 t-nuts as they are the same low profile.  These are low profile meaning they are thinner than stock brass T-nuts by about 2.2mm from top to bottom but STRONGER.  See the video below for some of the testing including breaking T-nuts in slow motion.  Sold in pack of 10qty.

This is the dimensions of this part:

These are also available in M6 on a separate product listing. 

Hoverglide Hydrofoil Mast Base Plate. This is an extra base plate for your hoverglide hydrofoil. If you get the flight school you will want one of these to make it easier to switch between your full length mast and your other length masts for shallow water or to teach your friends to foil.

You will need to buy a base plate to go with the flight school system if you're getting either the Lift or Liquid Force Interface Plates.