22 x 28 .015 Styrene sample boards- pack of 10 Packed in 10 sheets per box, these Styrene boards are flexible, white .015 polystyrene. These boards are used for sample making(examples faux painted). They are as flexible as poster boards but will not tear! The smooth finish allows for smooth basecoating. Best if primed with a bonding primer and then basecoated. Makes beautiful marble and woodgrained samples where a perfectly smooth finish is necessary. Also fantastic for texture finishes such as Venetian Plasters and synthetic stuccos. Sold in packs of 10.