A set of 5 items: a bone nut (blank) with a Martin-type slanted bottom, two cow bone nuts, a black Tusq nut, and a Tusq saddle. Only the Martin-type nut is new and unopened. The height of the used nuts is approximately 7.5mm for the cow bone nuts and approximately 7.0mm for the black Tusq nut. The length of the side parallel to the frets was measured by an amateur and is 42.9mm. Regardless, the four nuts and the saddle are used, so please consider this for those who can do their own modifications. Please ask in the comments for details on the parts included in the listing. The price is set low because some items are used. Please refrain from purchasing if you are looking for a perfect item. - Brand: ALLPARTS - Type: Bone Nut Blank - Compatibility: For Martin guitars - Color: Ivory - Quantity: Set of 4 Thank you for viewing.