Diamond 900 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. $175.00 - Long volume (Can be used like an arete)- Symmetrical volume - Bomber T-nuts (metric T-nuts available upon request) Length 35.5 inches Width 11.5 inches Height 6 inches T-nuts 16 Design options Base plate