POWERTEC 70102 8-1/2-Inch Jointer Dust Hood, 8-1/2-Inch by 10-1/4-Inch by 4 Inch Designed to mount over the chip chute of most jointers in today's market Tough, durable ABS plastic material Overall size: 8-1/2-Inch width by 10-1/4-Inch length by 4-Inch diameter 4-Inch nominal end measures 3-13/16-Inch O.D. and 3-41/64-Inch I.D. 4-Inch end connect to standard 4-inch flexible hose