Pentagon 800 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. - 5 sided shape- Asymmetrical volume- Bomber T-nuts (metric T-nuts available upon request) Length 33 inches Height 9 inches T-nuts 20 Design options Base plate