rotatable swivel chair with gas lift - synchro mechanism with 4 anti-shock blocks - permanent contact mechanism - Backrest adjustable up-down - adjustable lumbar support; Alt.tot .: 102-113; Prof.tot .: 68; Alt.schienale: 52; Larg.schienale: 45; Larg.seduta: 47; Prof.Sedile: 47; Optional armrests.