• 2H hardness for painting. Passed salt spray test more than 500 hours

• 6mm frame plate thickness & 1.5mm PU leather thickness with high quality

• High durable hardness filler material in back Cushion

• Back cushion wooden supporter at 21mm thickness

• 7-level Flexible Adjustment by pitch 30mm

• Handlebar build for easy moving by wheels

• Fixed nailing holes for machine

• Aluminum knob, cap and ring