Material:fiberglass and high quality siliconeSizes:Silicone Hot Dog Bun Mold: 15.75 X 11.81 inchThe Single Cavity: 5.12 X 2.55 X0.86 inchCavity:8 cavitiesProduct Special Features:Easy to Clean and StoreNon Stick Silicone MaterialFree Breathing Perforated Mesh DesignUsed safely in oven microwave freezer and dishwasherNotes:Wash with mild soapy water before first use.For better use put hamburger bun pan on a baking sheet to keep everything even.Please keep the mould away from fire in case the bread mould gets distorted.