425N Gas Spring with 10mm end sockets, Overall Length 20 1/8″ x Cylinder Length 12 3/4″x 5 1/8″ Stroke. Has been known to fit Sunquest 24RSF and 24SF beds. Hydro-lift Part number 5458KL. This Spring sold Individually. Please check your pressure force and dimensions to make sure these will work with your tanning bed. If you are not positive then please call 1-800-667-9189Click on photo for larger view and additional photos.