Adjustable post height: 16″ – 20″. All Snap-Lock Series components snap and hold together. Posts are sturdy, bright anodized aluminum. Includes a larger locking clip with a metal insert that slows the posts to lock into bases for added safety. Press button to release. Both the Snap-Lock and locking clip are engineered to prevent unintentional detachment. Adjustable height posts with integral seat mounts. ABYC Code: B.