... sure without drifting and easy to stop,insure safe pneumatic is optional rotary arm length1000mmlength is optional rotary radius≥ ... shelf 2pcs (prevention of collision system)quantity is optional medical gas outlets 1 oxygen outlets,1 vacuum,1 air outletsquantity ... we supply: we supply more than many models of medical pendants ,including surgical pendants,anesthesia pendants,endoscopy pendants,ICU ...