Buhl Spirometer Tub Lifts RailTM easily folds up to 8975 RailTM easily folds up to store out of the way and will not accidentally fall down causing an impact injury * Unmatched sturdiness unlike other fold down rails that wobble the P * Features 6 solid oak legs held in place with 3 bolts in each * Extra center support * Ultra firm 2' thick padding * Custom bumper strips protects vinyl top * Frame secured by steel angle * 18 standard height * Upholstery color choices: Slate Blue Desert Tan Red & Black Spirometer * Indicator registers forced vital lung capacity up to 7 liters * Needle stays at maximum until reset * Weight: 6 ounces * Can be used as an incentive exerciser *