Armchair with upholstered seat, elastic/breathable mesh back with or without movable cover. Back available in 3 heights: task, operational, directional with fixed head-rest. Structure fitting seat/back/arms in extruded curved aluminium painted or polished. 5 stars aluminium base, gas lift, special castors or feet. Special big size holed castors for this special range. Available with: T-arms adjustable (height and depth) ones, with or without leather cover; tilt mechanism Syncro-Max decentralized synchronized, with or without seat depth integrated movement and for all multi-stop antishok system