This sealing kit is designed for Harder & Steenbeck Evolution CRplus Airbrushes. It contains all the necessary seals to maintain your airbrush in optimal condition. While the repair can be done without special tools, the Harder & Steenbeck Screwdriver can simplify the needle seal removal process. Includes: - 2 x PTFE Nozzle O Rings (123180) - 2 x Air Cap O Rings (123190) - 3 x PTFE Needle O Ring (123450) - 1 x PTFE Gravity Cup O Ring (126340) - 1 x Air Valve Body O Ring (123240) - 1 x PTFE Upper Air Valve Seal (123220V) - 1 x Valve Stek