Precision molded plungers are available in three styles. Each style has its own functional characteristics.
All are designed to fit the cartridge contour, assuring complete dispensing and reducing waste. The WP
or Wiper Plunger has the highest amount of interference. This provides the most complete wiping action
on the cartridge inside diameter. The P-plunger has medium interference. It provides clean wiping action,
inserts easily, and allows evacuation of entrapped air. The PRS or Pressure Relief Plunger has the least
interference. It has been specifically designed to be easily inserted and reduce air entrapment during filling
and dispensing. This dramatically reduces problems with dripping or stringing during dispensing.