Apollo offers both the Standard and "HS" (High Solids) air caps. Please choose from the follow air caps choices pairing them with the following needle and nozzle sizes. Standard air caps are generally intended to be used for most clear finishes and high quality enamels. The high solid air caps are intended to be used for spraying high viscos or thicker pigmented paints. However, you can also pair them for custom effects and we encourage to mix and match.