Safe MaterialThese accurate Zodiac pool cleaner rubber tracks are made of heavy duty rubber that exceeds OEM standards, you can replace the parts to extend the life of your Zodiac inground pool cleaner tracks. Largely applicable Zodiac Mx6 pool cleaner track tires have an inner diameter of 5.5 inches and an outer diameter of 6 inches and MX6, MX6 Elite, MX8 and MX8 Elite pool cleaner models For most occasionsWe designed this pool cleaner wheel track to be large logarithmic occasions, the best choice for pool cleaning in homes, houses, condominiums, high-rise buildings, large and small towers Easy to installZodiac Mx8 pool cleaner rails are strong and durable. No tools and no need to hire a technician, you can assemble it independently, so you don't have to worry about the installation.