Chemistry 6'0" x 19 3/4" x 2 1/2" = estimated 31.0L single wing round pin tail Prototype Zen 4 model handshaped by Jason Bennett for himself. PU team light glass job (4oz/4oz 3/4 patch Deck - 4oz Bottom). FCS II Fin System - Twin + Trailer Set up. 6 channel bottom. This board is in OK condition. Was used a lot in the early development of the Zen 4 model. Resin tinted peach and marble splash