305 x 305mm (12" x 12") x 0.75mm (0.030") Manufactured here at our works by curing a single layer of 200g woven carbon fibre (fiber) fabric either side of a single layer of 300g Uni Directional (UD) carbon fibre reinforcement under a vacuum at 120 Deg C, which produces a 0.75mm (0.030") thickness (30 thousandths of an inch) this is a lightweight but exceptionally strong material - a true aerospace grade product, with an amazing surface finish.