The J30 office chair is an entry-range, high back office chair with adjustable lumbar support. The J30 office chair is one of the popular office chairs in our entry-level, high back chairs given its functions and affordable pricing. Features ✅ Headrest height adjustment ✅ Armrests height adjustment ✅ Seat height adjustment ✅ Lumbar support height adjustment ✅ Lock and rock mechanism ✅ Maximum weight capacity 90 KG ✅ Self setup ✅ 6 months warranty against mechanism (i.e. hydraulic gas lift)