Replacement for part number 3884997-R6: Guide wheels and pulley kit compatible with Dolphin pool cleaner models. Includes 4 guide wheels and 2 pulley gears. Designed for easy installation with no special tools required. Enhances performance and efficiency of your pool cleaning system. High compatibility with Dolphin Prowler 820, Prowler 830, Wave 50, Wave 75, Wave 90, Wave 2X2 Gyro, Quest, Premier, Plus, C5, Advantage Plus RC, Advantage Plus Pro RC, Deluxe 3, Deluxe 4, 3001, DLX 4, Deluxe 5, HD, PROX2, DX6, M400, M500, M5, Edge, Triton, Triton Plus, Heavy Duty, and other compatible robotic pool cleaners. For model-specific questions, contact seller through Amazon messaging. Made from durable PVC materials for long-lasting performance. Resistant to wear and ensures smooth operation. Helps maintain optimal functionality of your pool cleaner. Guide wheels provide excellent traction and climbing ability. Package includes: 4 x Guide wheels, 2 x Pulley gears. Guide wheel dimensions: approximately 2.05 x 2.05 x 1.06 inches. Inner diameter: approximately 1.18 inches. Pulley gear dimensions: approximately 2.24 x 2.24 x 1.57 inches. Compact design for easy storage. Color: White. Note: Actual product color may vary slightly due to lighting and screen settings. Size may vary by +/- 1-3 cm due to manual measurement.