Year of Manufacture: 2004 Seat Measurement: 17.5" Seat Type: L (average) Flap Measurement: 14.5" long (as measured from the top of the stirrup bar) x 13.5" wide Flap Style: 4 (long) Tree: M20 (medium) Dot to Dot: 4.5" (medium) Knee Blocks: Yes Thigh Blocks: Yes Serial #: 339 4L 175 M20 339 04 Comes with a black non-branded cover