V1
The V1 rotational ball (shown above in the Standard material) ships in all Standard material the original design for the rotational ball, which allows maximum rotation and control of airflow. The knob is the only constraing that prevents this style of ball from rotating 360 degrees within the vent housing.
This option is ideal for someone who wants maximum control of the direction of airflow.
V2
The V2 rotational ball (shown above in the high-temperature matte material) ships standard in all high-temp vents. This is a revised version of the V1 ball, with an added lip around the inward-facing lip of the ball, which constrains its rotation. This lip prevents the ball from rotating too far to any side, which could could block some of the airflow from your heater or AC system.
This option is ideal for anyone who wants a vent with directional control and constant maximum airflow.
Standard
Standard material parts are manufactured from a PETG plastic.
Resists heat up to 155F/69C
This is an excellent material choice for use with air conditioner systems or low output heaters, where temperatures are confirmed to stay within the rated threshold.
High-Temp Satin
High-temp Satin parts are manufactured from an ASA plastic.
Resists heat up to 212F/100C
This is an excellent material for diesel heaters and higher-heat applications.
High-Temp Matte
High-temp Matte parts are manufactured with a carbon fiber-filled ASA plastic.
Resists heat up to 230F/110C
This is an excellent material choice for diesel heaters and higher-heat applications.