This Kokido brush head is 45 cm wide and curved, so the bristles reach the wall and the turn into the floor at the same time. The back and the handle are aluminium, which keeps the head rigid when you scrub hard at a deposit; there is a black bumper at each end to spare the wall.
The bristles are nylon. According to Kokido the brush suits both liner and concrete pools. You use it for the dirt line at the waterline, for the corners and the steps, and for all the places the vacuum cannot reach.
Note: you are buying the brush head only. It clips onto a telescopic pole with the usual fitting, but that pole is not in the packaging, so order one alongside if you do not have one yet.
Basic equipment in the maintenance kit, next to the leaf skimmer and the vacuum, and the first thing you reach for as soon as the waterline starts to go dull.
