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Review title: Openings are 2 1/4 NOT 2 1/2
Product review: I bought this, along with two 2 1/2 - 1 1/4 reducers that Amazon suggested I purchase so I could use this with my shop-vac that uses 1 1/4 hoses. Well, the openings on the unit are not 2 1/2 inches but 2 1/4, rendering the couplers useless. Thanks Amazon for wasting my time. I could have made this at home out of plywood and pvc for next to nothing. It is all going back.
