Made from 0.29 mm gauge mild steel with a non stick superior Teflon classic finish. Oven Safe upt o 240°C with a 5-year guarantee. Dishwasher safe and made in the UK. This set consists of 2 multi-use trays. Tray 1 dimensions 367 x 243 x 50 mm and Tray 2 dimensions 305 x 192 x 32 mm.