Upholstery: Premium Italian top-grain cowhide leather or high-quality PU leather (KOYI brand).

Cushioning: High-resilience premium foam; seat with 40# high-density foam; backrest with high-density doll cotton.

Plywood: Density ≥600kg/m³, moisture content ≤9%. Processed with high-temperature steaming, drying, and lamination — resistant to deformation, insects, and mildew.

Base & Gas Lift: Equipped with height adjustment, tilt with 4-position lock, and synchronized multi-functional tilt mechanism. Fitted with Xieqiang TUV-certified Class 3 electroplated gas lift (beveled daisy-core type).

Armrests, Base & Casters: ADC10 high-grade steel, integrally die-cast. Double-polished (rough + fine) steel base with lower carbon and lead content for higher environmental standards and brighter finish. Custom-molded black PU shock-absorbing silent casters.