The entry port diameter is 10 mm, suitable for sealing 14/16/18 gauge cords, braided cables, and flat wires. Designed to keep cord connections secure and protected. Compact size and lightweight design make it ideal for protecting outlets, plugs, sockets, or connections suspended in the air. Features a snap-lock lid and rubber gaskets, providing IP44 protection. Made from heavy-duty reinforced polypropylene (PP) to withstand rain, snow, water, dust, and dirt, offering continuous protection for outdoor electrical connections. Easy to use: place the connection inside the safety enclosure and secure the cord with the built-in clamps. To hang the cover, use the included cable ties through the side mounting holes. Suitable for a wide range of indoor and outdoor applications, including lawn and garden power tools, holiday lighting, landscape decorations, pool pumps, fountains, fish ponds, patio heaters, air conditioners, and security cameras. Dimensions: 21 x 7 x 7 cm Color: Black Material: Polypropylene (PP) Style: A Note: This extension cable box is not compatible with power strips, right-angle plugs, or large adapters. Package includes: 2 x Extension Cable Plug Connection Protective Safety Covers Other items shown are not included. Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance is ±1–3 cm.