Home Office Chair Ergonomic Desk Chair Mesh Computer Chair With Lumbar, Black. ??Easy to Set up? - Office chair comes with all hardware necessary tools. Follow the desk chair instruction, you'll found easy to assemble, and computer chair estimated assembly time in about 10-15mins. ??Soft Comfort Seat? - Desk chair using high-density sponge cushion, more flexible, office chair with a middle back design, rectangular ornament not only as a decoration, it can provide good lumbar support makes you feel comfortable. ??Quality Material? - All the accessories of our office chair have passed the test of BIFMA, which is a guarantee for your personal safety. The mesh chair can bear the weight of 250lbs. ??With Armrest? - It is a good choice to add one of our computer chair in your office or put a desk chair in your home/activity room. The seat height can be adjusted from 17.1"-20.3" and the seat measures 18.5"(W)*18"(D) ??Ergonomic New Patent?- The cushion of office chair, armrest accord with human body engineering design, let your body and mesh chair perfect fit, suit long time use, give you creative design!