What this part does Seals the open bottom of metal support legs to keep out dirt, insects and standing water. Adds a protective barrier between the pool leg and the ground to reduce corrosion and wear. Helps stabilize the pool frame during setup and while transporting the pool. Key benefits (why you need it) Prevents debris buildup inside frame tubes, making assembly and disassembly faster and reducing maintenance. Protects leg ends from ground moisture, erosion and accidental damage, extending the life of your pool frame. Durable construction resists cracking and deformation so the cap retains fit and function season after season. Compatibility and size Designed for metal frame pools 18 to 24 feet in diameter with vertical leg posts that have 2.00 inch diameter holes. Compatible with model numbers 28279, 28270, 28271, 28253EH. Also fits small rectangular pools sized: 10 ft x 30 in, 12 ft x 30 in, 12 ft x 33 in, 12 ft x 36 in, and 12 ft x 39 in. Each pack contains one quarter leg end cap. Material and performance Made from sturdy plastic formulated for outdoor pool use. Resistant to UV exposure and typical pool environment conditions to maintain shape and strength over time. Designed for a snug fit to prevent unwanted movement while in use. Typical applications (use scenarios) 1. a worn or missing leg cap on a 24 ft metal frame pool before the summer season to prevent dirt entry and restore stable footing. 2. Add protection to pool legs prior to winter storage or moving the pool to a location to minimize damage from moisture and rough ground. 3. Fit onto the quarter legs of small rectangular pools (10 ft or 12 ft models listed above) to reduce internal corrosion and make routine maintenance easier. Installation notes Push the cap onto the open bottom of the vertical leg until fully seated; no special tools required. Verify hole diameter is 2.00 inches to ensure proper fit. Includes: one quarter leg end cap per pack, compatible with the models and pool sizes listed above.