Features:

• 4"x4"x11"
• Lighter than steel
• Last 10 times longer than wood
• Stack efficiently
• Spread the pressure of the strap over 12", 24", 36" or 48
• Unlike aluminum they will bend, then return to their original shape
• Weather resistant
• Do not crack in freezing temperatures, will not burn your hands in hot temperatures
• Cost efficient
• Made in various colors
• Do little or no damage if they come loose