Material: This pool plug, made of rubber and stainless steel ribs, offers optimal expansion for a perfect seal, resistant to seasonal temperature changes without deformation. Versatile Use: Ideal for sealing skimmers, drain pipes, and return lines during winter. Also use it to isolate the hydraulic system during technical repairs or professional tests. Winter Protection: Prevents frost damage to your pipes. Its conical design fits perfectly against the pipe walls, preventing water or debris from entering during the cold season. Easy to Install: Insert manually without tools thanks to its textured, non-slip surface. Immediate removal with a simple pull. Compact and lightweight (70g), it fits into any pool equipment storage pocket. Technical Design: Optimized shape for maximum grip. Smooth surface prevents it from sticking to the walls. Compatible with all types of pools (above ground, in-ground, spa) and all standard diameters.