The type of horn from which the majority of the hoof capsule is made. It consists of many elongated cylinders of horn (horn tubules) lying parallel to each other and running continuously from the coronary band to the bearing edge, the horn tubules are grown from the epidermis of the coronary papillae. Between these tubules lies strong intertubular horn which forms a matrix in which the tubules are embedded, this is grown from the coronary epidermis between the papillae.