360 ° free rotation+8 ° tilt angle Equipped with SGS certified air pressure rod (Class 3), supporting height adjustment of 21.7-28.3 inches, precise positioning achieved through one click wrench, compatible with 70-120cm height office desks. Adjustable speed up to 2cm/s, noise level below 35 decibels, suitable for frequent switching between sitting and standing positions. 3D armrest adjustment The armrest supports three-dimensional adjustment of up and down (5cm), front and back (3cm), and left and right (45 °), which can match different arm lengths and office postures, reducing shoulder fatigue. Material and Craftsmanship Environmentally friendly and skin friendly fabric The surface is made of breathable mesh fabric (weight 120gsm), which has been treated with antibacterial agents (inhibition rate 99.9%). The back is designed with diamond shaped breathable holes to accelerate air circulation and avoid stuffiness. The edge wrapping adopts double needle sewing technology, with a tensile strength of 200N/cm, ensuring long-term use without detachment. Technical Specifications Table Project parameter testing standards Rotating lifespan 100000 times without any faults BIFMA X5.1 Tilt life 50000 times without attenuation ISO 9241-507 Wheel casters are wear-resistant for 100000 times without wear according to EN 1335-3 Formaldehyde emission 0.02mg/m ³ (E0 grade) GB/T 17657-2013 Applicable temperature -20 ℃~40 ℃ IEC 60068-2-1:2007