1: Casters: ordinary casters, PU wheels (soft materials, suitable for wooden floors, and machine rooms).
2: Chair foot: The thickness of the iron frame directly affects the service life of the chair. Surface treatment: polishing, painting, baking varnish (surface gloss, not easy to remove paint), electroplating delete album (wood frame can not be electroplated), plating quality is good, it is not easy to rust.
3: Air lever: Also called the extension rod, used to adjust the height and rotation of the chair.
4: Chassis: The part that holds the seat, and the bottom is connected to the air rod.
5: Seat: It consists of wood, sponge and fabric. The quality of the board is usually not felt by consumers. Sponge: Recycled cotton, new cotton. 99% of the manufacturers use the two together. The thicker and harder, the higher the cost, the appropriate thickness and the appropriate hardness. Press the seat by hand, fabric: paralysis, mesh, leather. The plastic frame is pressed against the net. This type of chair is more breathable.
6: Handrail: Thickness affects quality.
7: Seat back seat connection (corner code): seat and seat back are separated, connected by steel pipe or steel plate, steel plate, usually 6mm or 8mm thick. However, steel plates with a width of less than 6 cm must be 8 mm thick.
8: Chair back: steel frame, plastic frame chair, made of mesh combined, breathable.
9: Lumbar pillow: reflects the comfort of the chair.
10: Headrest: Shows the comfort of the chair.