The vented dome on the side outlet drain allows a high flow of water to pass through it.A tremendous flow rate! A flow of 36 litres per minute can be taken from the shower tray and passed through the waste. At 1.6in high this side outlet drain is very slim shower base trap on the market This replacement shower base drain is perfect for stand-up shower and bath installations, working well in places with limited space. Made from ABS plastic for long lasting quality. Keeping the waste clean and carrying out any maintenance is quick and simple. Colour:White Material:plastic Package Contents: 1 * floor drain 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.