Product Highlights The PREMIER 320 is a sturdy and highly maneuverable workhorse that will chew through 3" thick branches and armloads of yard and garden waste (up to a half-inch in diameter) with ease. Compact, powerful, and easy to use! Specifications Chipping Chipper Flywheel 14.75" Dia, 17.6 lbs, 1/4" thick Chipper Knife Size 4.125" x 1.25" x .25" Chipper Knife Speed 231 ft/s (158 mph) Hopper Opening Size 10.4" x 7.2" Dimensions Shipping Weight 145 lbs Weight 129 lbs Shipping Dimensions 39.25 x 24 x 27.375 Engine Air Filter Dual Element Cooling Methods Air Displacement 223cc Horsepower 6.6 HP Lubrication Splash Make DR Number Of Cylinders 1 Oil Capacity .55L Oil Type 10W-30 or 15W-39 RPM Speeds 3600 RPM Starting Type Manual Fuel_System Fuel Capacity 3.4L General Assembly Yes Shredding Shredder Hopper Opening 19.8" x 13.7" Standard Screen .94" Shredding Capacity 1/2" diameter woody material Warranty Engine Warranty 2 Year Residential, 90 Day Commercial Machine Warranty 2 Year Residential, 90 Day Commercial Wheels_Tires Number of Tires 2 Tire Size 14" x 2" Tread Plastic Tread Cap