This listing is for one replacement Side Vermiculite Firebrick for an 'Aarrow View Acorn 4' stove.Brick Size = 25mm x 230mm x 230mmThe fire brick provides fire resistance, insulation and thermal stability and is rated for temperatures up to 1100°c.All our vermiculite fire bricks are cut from Premium Quality Vermiculite Boards which are ideal for use in woodburning and multi-fuel stoves.We advise when replacing your fire bricks that you replace the full set.