All cast iron. Spring-loaded and removable center rod with cool-touch spring handle. Fits standard 6in. black or blue stove pipe. This item is not for sale in the state of California and Washington. Customers are responsible for checking local codes and regulations prior to purchase. Mounting Type Inside stove pipe, Product Style Dampers, Fuel Type Wood burning, Color Black, Pieces qty. 1, Material Type Cast iron, Mounting Hardware Included Yes, Pipe Diameter in. 6, Length in. 6, Adjustable Yes.