Darren M18 Ergonomic Office and Computer ChairHigh QualityOur high back office chair's gas lift has been certified by BIFMA and SGS, passing the static pressure test of 1136 kg. Our desk chair can support a weight of up to 150 kg. Simple instructions enable anyone to assemble the chair in just eight steps. Patterned Mesh & TPU ArmrestsAs the picture shows, the chair features a patterned mesh that differs from that of the M18. Furthermore, the surface of the armrests is made of TPU, a smooth