10 Ft. DuroDyne MBX Excelon Series Flexible Duct Connector (# 10159) INCLUDES: 10 Feet x (3" metal to 3" fabric to 3" metal) Fabric is black woven nylon/polyester blend with vinyl coating Excellent water resistance, tear strength and unaffected by mildew UL classified file # R4462 #10159 MBX Metalfab; Quiets down duct system noises and vibrations