You will receive the four gauges shown in the first picture (with pressure angle shown), the rest of the photos are mock-ups showing the gauge in detail and in-use.

This Set of Gear Tooth Gauges is meant for measuring Diametral Pitch (Inch)/Module (Metric) and 14.5/20 degree Pressure Angle gears.

Set contains:

1x - Diametral Pitch (Inch) 14.5° Pressure Angle

1x - Diametral Pitch (Inch) 20° Pressure Angle

1x - Module (Metric) 14.5° Pressure Angle

1x - Module (Metric) 20° Pressure Angle

Manufactured in the USA. 

Material is ~.08in thick plastic.