9985006-R2 TRACK REPLACEMENT PARTSCompatible With Numerous Maytronics Dolphin Robotic Pool Cleaner Models, Compatible With Dolphin DX Dolphin Explorer Dolphin Apollo Dolphin Wave Dolphin Nautilus Dolphin Advantage, and more.6101611-R4 ROCK CLIMBING RING REPLACEMENT PARTScompatible with robotic pool cleaners like DX3, DX4, DX6, M200, M400, M500, Atlantis, Apollo, Apollo Plus, Nautilus, Nautilus CC Plus, Oasis Z5i, Aquarius XL, Premier, Sigma, Primal X3, Triton (old), Deluxe 4/5, Saturn (old), Wave 65, Endeavor, Edge, HD, 3001, 2X2, Wave 2X2, Prowler 820/83.IMPROVE YOUR ROBOTIC POOL CLEANER'S PERFORMANCEWorn out tracks cause several performance setbacks for your automatic pool cleaner. 2-Pack Pool Cleaner Timing Track designed for tackling worn tracks that cause your automatic pool cleaner to move slowly, lack traction on the pool floor, and fail to climb walls. They are perfect for maintaining your pool safe and functioning properly.HIGH - QUALITY9985006-R2 pool tracks and 6101611-R4 rock Climbing ring replacement parts are made of high-quality materials to ensure that the duration is longer.POOL CLEANER REPLACEMENT KIT2 Pack Part Number# 9985006-R2 Pool Cleaner Timing Track; 4 Pack Part number# 6101611-R4 climbing ringsNOTEIf the climbing rings you receive are in a dry and hard state, you only need to soak them in water and they can soften.Help others learn more about this product by uploading a video