The Mini-Storm Jets by Waterway unite high-precision water flow with bold design for one unbeatable spa jet. They require a 2-3/16 hole for installation, are designed to use a flat gasket, and a 2 1/4 hole that is designed to use a grommet style gasket. Mini-Storm jets are built with 3 and 3-5/16 diameters and are available in smooth and large face textures. These jets come with a variety of eyeball options, including Directional and Rotational, as well as Twin Rotational for comprehensive hydrotherapy. Their Twister options also make them a highly reliable line.