wavy Coulter Blade 16 In X 4 Mm, 2-1/8 In. Round Center Hole, (5 1/2 In. Diameter Holes On A 4-1/2 In. Bolt Circle Diameter. Specifications Wavy Coulter Blade 12 Wave X 3/4" 16" Diameter X 4 Mm 2-1/8" Round Center Hole Bolt Pattern: (5 1/2" Diameter...