, high quality swimming pool main drain. The design of this main drain cover allows to flow through the cover and reduces the risk of swimmers being trapped by strong suction. A surface that allows water to flow to the drain while allowing any pool cleaner to pass through . This vortex-resistant main drain cover fits most standard inground pools. Get ready for pool season with preventive maintenance on your pool equipment. Get your pool equipment ready for pool season with preventative maintenance. Colour:White Material:ABS Package Contents: 2 * Swimming pool main drainter 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.