The return im using , Hayward sp1023 I think came with these clear gaskets and the card board ones but they have two ribs on one side I've never used them , this store has sold me bogus gaskets before or after market Crud that doesnt fit. Most sites that sell this return and every return I've used has black flat gaskets , will the clear ones work ? If so which side goes where, Or don't chance it . They are definately not the same material .The return is going in the steps for some insight!