Deluxe Indoor Aluminum Tennis Center is a smaller version of the Gared volleyball system and is ideal for multi sport facilities. 4' O.D. uprights are constructed of a strong, yet lightweight anodized extruded aluminum for superior support and long life. Easy to operate ratchet winch sets net tension. Exclusive wedge lock holds sliding rail system securely. Uses 3.5mm Polyethylene Edward's Tennis Net sold separately. 10 Year Warranty.