✅ Selected Material: High density shaping foam, more comfortable, elasticity resilience and service life. 1.8mm thick steel frame, more sturdy and stable. Pu Leather, skin friendly and wear resisting.✅ Upgraded Configuration: Class 3 gas lift, durable, reliable and supports up to 250lbs. Rubber casters, rolling quietly and tested by 1000 miles rolling.✅ Multi Function: 360 degree swivel and multi direction wheels, load capacity: 250-pound maximum weight capacity. Rocking function: chair can rock back and forth when you adjust the knob beneath the seat. ✅ Handling time before shipping: 3 business days ✅ Express Shipping Period: 1 Week