High Back Mower Seat Width: 18 ", Height: 13 1/4 ", (*Spring mount -- center plate with one 1/2"-13 weld nut), Heavily padded seat back provides maximum support for the lumbar area of the operator's back, One hole bolt pattern 1/2"-13 and 12 hole pattern 5/16"-18 clinch mounting nuts, Depth: 14 3/4 ". Replaces Part Numbers: Lesco 050107 Stens Part Number: 420-046