Promed Frees Saffier Lange Cylinder power 23W The 60 kg unit requires Maat:M The 60 kg unit requires self assembly and includes a one year warranty This medium gas spring lift is intended for replacing or fitting the lift component in compatible stools and chairs The long cylinder shape offers a working profile for larger nails and extended callus areas 35 mm shank is compatible with Promed nail drill units fitted with a standard collet