Zodiac Polaris 280 TankTrax Wheel Block w/Inserts (R0706000) airsupply and this Darlly cartridge is

and this Darlly cartridge is designed for compatible applications referencing FC-0315

Designed for compatible heater retrofit applications

Keeping the correct 1-1/2 inch size and vertical mount format helps preserve the intended layout of the installation and makes replacement more straightforward

Genuine Hayward part SMX306000024

Zodiac Polaris 280 TankTrax Wheel Block w/Inserts (R0706000) airsupply and this Darlly cartridge isZodiac Polaris 280 TankTrax Wheel Block w Inserts (R0706000) is an OEM style replacement part for maintaining compatible Zodiac pool equipment with the correct fit and service function. This cleaners & parts item supports cleaner traction, movement, or surface contact so the compatible Polaris unit can travel more consistently across the pool floor and walls. Replacing worn rolling or brushing components can help correct slipping, uneven travel,