Kondex Knife Head Segment for John Deere AH218389 Center Segment, Coarse T709 2020 and engineered for a precise 2641BE and engineered for a precise fit 1 1 4" Bearing Type Specialty Ag Greasable Sealed Greasable Outer Race Shape Spherical Bore Shape Hex Bearing O Brand Kondex Section Part # 491 632621 ( H163131 ) Segment Type Center Segment Serration Spec Coarse Tooth 7 per Inch Sections per Segment 23 plus 2 Overlap Sections Drive Type Double Drive Header Width 40 Foot Header Width 45 Foot Header Type Flex Draper Drive Type Single Drive Header Width 30 Foot Header Type Rigid Draper Header Width 18 Foot Header Width 20 Foot Header Width 22 Foot Header Width 25 Foot Header Width 35 Foot Header Type Platform Header Specifications