The 413 is similar to the 411 but with an integrated head rest giving more upper back and head support. Its thin back allows the seat to be adjusted further back on the slide rails giving more leg room in smaller cabin trucks. Mechanical helical spring suspension unit with 100mm stroke. * Weight adjustment 50-120kg 60mm * Seat height and tilt adjustment * Full seat back recline * 160mm slide rail adjustment * Suspension cover * 5 position mechanical lumbar adjustment