The 420 straight stairlift is a direct replacement for the 400. The main difference being that the trailing cable/trolley weight has been removed and replaced with a constant charging system. In addition the 420 will no longer use hard-wired controls but will instead use the new style infrared remote controls.
Development of the Stannah 420 automatic hinge is still ongoing, in the meantime Stannah will continue to sell the 400 hinge using the trailing cable and trolley weight.
