Binks 66SD Air Cap with retaining ring, also known as an air nozzle, are commonly used with very thin and medium fluids including dyes, stains, solvents, water, inks, varnishes, shellacs, fillers, primers, epoxies, urethanes, lubricants, and wax emulsions. This size also works well with waterbased and solvent based adhesives, and PTFE.