Made in PP (polypropylene) stabilised against UV rays. Standard white colour. It is necessary to construct the channel 5mm wider that the grating itself, to allow for easy of removal and to allow expansion. The longitudinal design of the tiles ensures that any excess water from the pool is not allowed to overflow onto the pool surround keeping this area dry. For clicking together same types of male-female tiles (5 units = 1,024m). Their flexibility enables obtaining curve with a minimum radius of 5m.