Weir Door ? Poolrite S1800 MKII Skimmer Weir Door Flap
Skimmer box weir door flap to suit PoolRite S1800 skimmer boxes.
Suits Poolrite S1800 Skimmer
Length 237 mm Wide
Depth 163mm without bump stops
UV and Chemical Resistant materials
High-Density Floats 
Rubber Bump Stops