Second Story Floor Sleeve Adapter allows for standard floor sleeves on every level of your facility • Unit bolts to underside of concrete or beam that allows for normal installation of floor sleeves • Constructed of 6-5/8" O.D. heavy-guage steel and 0.156 wall tubing and steel channels for ultimate support and stability • Adapter measures 6" I.D. and is for use with all sleeves • Compatible with all GARED® volleyball systems.