Product Description This replacement tee crank casement operator is constructed from zinc die cast and comes finished in white. It features five sets of adapters allowing this part to fit most casement operators. It includes inserts for 9/32, 5/16, 3/8, 3/8(extra deep), and 11/32 spline sizes. From the Manufacturer This casement operator is constructed from zinc diecast and comes finished in white. It features five sets of adapters allowing this part to fit most casement operators. It includes inserts for 9/32, 5/16, 3/8, 3/8(extra deep), and 11/32 spline sizes.