Check the listing for details. (2 Pack) Replacement Gray Tracks for Maytronics Dolphin Robotic Pool Cleaners. Color: Gray, Condition: New. Listed at 24.76 USD. These high-quality gray tracks are compatible with these Maytronics Dolphin models: Maytronics Dolphin Active 10 Maytronics Dolphin Active 20 Maytronics Dolphin Active 30 Maytronics Dolphin Active 30i Maytronics Dolphin Cayman Maytronics Dolphin Discovery Maytronics Dolphin Echo Maytronics Dolphin E10 Maytronics Dolphin Encore Maytronics Dolphin Escape Maytronics Dolphin Nautilus CC Maytronics Dolphin Premium Maytronics Dolphin Prowler 910 Maytronics Dolphin Prowler 917 Maytronics Dolphin Prowler 920 Maytronics Dolphin Prowler 930 Maytronics Dolphin Quantum Maytronics Dolphin Saturn Maytronics Dolphin Triton PS Maytronics Dolphin T15 Maytronics Dolphin T35 Maytronics Dolphin T45 Maytronics Dolphin T55i