Noise Control Impaling Clips, Width 3 in, Length 6 in, Height 1 in, Material Steel, For Use With ProPanels, Coverage 4 x 4 ft Panel, Characteristics Offset Wall Mounting Clip for Auralex ProPanels, Improves Low Frequency Absorption When Compared to Flush Mounting, Package Quantity 4. This item has been restricted from sale in the following state (s): []