HS Strut includes double D, double dead & cutter 2.5 diaphragms - a Great set for beginner callers. Each diaphragm features a premium flex frame with Infinity latex and comfortable moisture resistant Yellow tape for seasons of consistency and durability. The HS Strut Infinity latex 'comes alive' with the most realistic and easy to blow diaphragms on the market. Each diaphragm is laser marked to Identify the various diaphragms in your arsenal, allowing you to mix it up and sound like multiple turkeys.