Some of the most popular Pyrex patterns today include: 1  of 07. Butterprint or Amish. 2  of 07. Daisy. 3  of 07. Dot or New Dots. 4  of 07. Eyes. 5  of 07. Gooseberry. 6  of 07. Rainbow Stripes. 7  of 07. Snowflake.
The friction surface of a vented rotor consists of two metal discs held together with vanes of metal which creates tunnels that let the heat escape. We call those cooling vanes. With the solid rotor, the friction surface consists of only one metal disc. This greatly reduces its ability for cooling. It is a common misunderstanding that you can choose whether you get a solid or vented rotor, this is NOT true.
All Pop Vent Roof Louver Models by Diameter and Collar Size. Note: 1 Collar vent models for Pitched Roof applications. Excellent on Steep Slope Roof Applications. Active Ventilation Products' Pop Vent also known as the Roof Louver is an excellent roof vent for ventilating attic spaces on steep slope roof applications. The Roof Louver will add necessary roof top ventilation to alleviate moisture from the attic in the winter and heat in the summer.