CMP Generic Poly Jet Internal [3 3 8" FD] [Roto Dlx Scal] [Gray] (25591 221 000) skimfilters The Waterway 210 3700 Poly Gunite The Waterway 210 3700 Poly Gunite jet tee body is designed for compatible gunite jet applications and features a 1 1 2 inch air slip connection This Balboa Cyclone Twin Spin barrel is designed for compatible Emerald Cut applications where the seat has lost the motion and texture that make this style of jet more engaging than a standard stream Gray finish The CMP Poly Jet internal is designed for compatible spa jet applications where a 3 3 8 inch face diameter roto style deluxe internal needs replacement