Black plastic flat bottom humbucker pickup ring set. Flat top(non-slanted) with 1/8" tall neck position and 3/8" tall bridge position. Inside dimensions are 2-3/4" X 1-1/2". Outside dimensions are 3-1/2" x 1-3/4. Pickup mounting hole spacing is 3-1/16". Ring mounting hole spacing is 3-3/16" x 1-7/16".