New plunger head design features two fluorocarbon elastomer X-Ring seals that provide superior sealing and chemical resistance Use this tool to check and adjust the oil level on conventional and single chamber cartridge forks Adjustable ring will measure oil levels from 0 to 300 mm in 5 mm increments New plunger head design allows easy cleaning and replacement of seals Syringe has a capacity of 60 ml. TOOL PRO FORK OIL LEVEL