Half Diamond 450 Interested? Please Contact us All volumes can be bolted on or screwed on, are made of 13 layer ¾ inch (18 mm) high-quality birch plywood, and coated with our special Blocz Texture. - Half of the Diamond 900- Symmetrical volume - Bomber T-nuts (metric T-nuts available upon request) Length 17.5 inches Width 11.5 inches Height 10 inches T-nuts 9 Design options