The replacement filter basket is compatible with the following f Dolphin Robotic Pool Cleaners: S50, S100, Active 10, Active 15, Echo, T15, T25, Proteus DX3, Saturn, Cayman, Escape, Prowler 910, Prowler 917, Warri SL, Ence, E10, Expler E20, Solo, Advantage, Nautilus CC, PLEASE NOTE - IT'S NOT COMPATIBLE WITH Nautilus CC Pro, Nautilus CC Supreme. IMPROVE YOUR ROBOTIC POOL CLEANER'S PERFMANCE - Wn out tracks cause several perfmance setbacks f your automatic pool cleaner. It may begin with sluggish movement, lack of traction on the pool flo, inability to climb walls. Don't wait until the cleaner begins to malfunction. Get ahead of your pool cleaner maintenance with a pair of br new, high-perfmance timing tracks. COMPATIBLE WITH F NUMEROUS MAYTRONICS DOLPHIN ROBOTIC POOL CLEANER MODELS - Perfect f models that require 2 tracks (one on either side) including models: f Dolphin DX, f Dolphin Expler, f Dolphin Apollo, f Dolphin Wave, f Dolphin Nautilus, f Dolphin Advantage, me. REPLACE TIMING TRACKS IN PAIRS - It's tempting to just replace the one track that looks wse f wear. But the truth is, the other timing track will soon follow on the tracks of its pair. Deteriation isn't always obvious especially f timing tracks that had wn out in a steady clean manner. But as a role of thumb, timing tracks that are over 2 years old should be accessed f wear replaced as needed. Please rinse clean every 4-6 weeks f the best perfmance. Colour:White and Gray Material:Plastic Package Contents: 1 Pool Cleaner Filter 9991460-R1 2 Pool Cleaner Timing Track 9985006-R2 Only the above package content, other products are not included. Note: Light reflection different displays may cause the col of the item in the picture a little different from the real thing. The measurement allowed err is 1-3cm.