Aluminum Horse StallsAluminum Horse Stalls from CannonBall are built from anodized aluminum for a quality, long lasting appearance. Stall components are shipped knocked down for inexpensive freight options but are designed for easy assembly. Available in clear or black in grille heights of 29" or 36", our Aluminum Horse Stalls can be equipped with feed openings, swing out feed doors or swing out feeders. Matching window grilles are also available. Stall door options include standard, drop down and feed opening.