Perfect Compatibility: Designed with precision craftsmanship, this adapter set includes 1 short connector, 2 connector joints, and 1 long connector to perfectly complement your original equipment for seamless connectivity Enhanced Filtration: Effortlessly connect a 40mm hose to a standard 3.8cm, providing a one-stop solution for better filtration capacity across multiple sand filters, increasing your pool's filtration efficiency Convenient Installation: Easily install this standard pool hose adapter in minutes, streamlining your pool accessories for a hassle-free experience Multi-Purpose: Increase the water flow of your above-ground pool with the 4K8001 adapter. Easily connects to pumps, filters, skimmers, and more for better circulation and smoother operation Note: The data are all manually measured, please allow 1-3cm error. Due to differences in light and display, there may be some color differences, please refer to the actual item received.