-Strong inner steel frame, which serves as a solid base for the entire chair -High backrest for supporting the whole back and supporting the correct posture of the spine -Sturdy five-arm metal cross with plastic caps ensuring perfect stability -Tilt mechanism for up to an angle of 150 degrees -Quality gas piston imported from Germany, meeting international SGS standards -1D armrests with soft surface -Up to 180cm and 130 kg*