This is my first pool. It was here but pretty much had to rennovate completely. There were no weir doors. I measure 8.25 in wide x 6.25 in tall inside the rectangle they go in. There arent holes in the box for them to hinge on. There are round tabs sticking out so the weir flap will have to have holes so these round tips can go inside the weir to hinge on. I've no idea where to get anything like this or what to shop for other than weir door or flap.