We have 6 Inch Grit Envirosight Style, fitting the RX130 Sewer Camera Transporter. Each wheel includes a molded outer hub, so only an inner adapter is required. Stop struggling in greasy pipe because you don?t want to wear out your expensive steel carbide grit wheels, make the 6 Inch Grit Wheel your go to wheel for all types of pipe. The more they wear, the better they get because the carbide grit is embedded throughout the polymer all the way to the hub. For your 8 Inch pipe needs, check out the 8?? Grit Wheel.