This Buff Grog Clay like the Stoneware Buff Smooth Clay has a splendidly developed body giving a high resistance to warping and cracking and come with a 10% 60s sand added for extra tooth giving extra strength for larger pots and modelled work.A very plastic general purpose clay excellent for throwing and modelling fires to a light grey.Firing temperatures 1140-1260°C.12.5kg pack.