This Conversion union is the perfect solution for converting pool pumps, pool filters, and pool heat pumps with metric 40mm female threaded connections to 1.5Inch hose screw-on nut. For use with standard above ground pools. Used to connect standard pools to equipment such as filters, pumps, and water tank heat pumps using 40mm female connections. The matric 40mm threaded connector end is for a matric 40mm female threaded connector while the 1-1/2 inch end is for a 1-1/2 inch standard pool hose screw-on nut. They're universal fit and threads excellently unto the FIP connector. The union nuts are also easy to loosen by hand for a quick disconnect. Made of material. Odorless and harmless. Better material, better for your healthy. Colour:Gray Material:Plastic Package Contents: 2 * Pool Hose Adapter 1 * tape 2 * rings Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.