THIS IS ONE MUFFLE CHAMBER FITTED WITH A COIL WIRE HEATING ELEMENT FOR R9-7; R9D-33 AND R9D-100 VERSIONS OF METAL MELTING KILNS. PLEASE SPECIFY REQUIRED TYPE OF CHAMBER (VERSION/MODEL AND/OR YEAR OF MANUFACTURE) ON PAYMENT OR CONTACT US REGARDING THIS MATTER BEFORE PLACE AN ORDER – WE WILL BE GLAD TO ASSIST.