The present disclosure is directed to a kit of prosthetic components having at least two monolithic adaptors. The first adaptor incorporates a first and a second coupling mechanism, where the height of the first coupling mechanism defines the distance between an articulating surface and a fixture. The second monolithic adaptor also includes a third and a fourth coupling mechanism. The height of the third coupling mechanism can also define the distance between the articulating surface and the fixture. The coupling mechanisms, that define the distance between the articulating surface and the fixture, do not have equal heights.