Specifications include, but are not limited to: 2-1/2" OD heavy-duty anchor & 26" sq. tube anchor extension - Breakaway U-Channel Mounting Device with 2-1/2" O.D. heavy-duty anchor and 26" sq. tube anchor extension (for use with 2 #/ft post in soil) ; Breakaway U-Channel Mounting Device with 2-1/2" O.D. heavy-duty anchor and 12" sq. tube anchor extension (for use with 2 #/ft post in asphalt) ; 2-1/2" OD heavy-duty anchor - Breakaway U-Channel Mounting Device with 2-1/2" O.D. heavy-duty anchor (for use with 2 #/ft post in concrete) ; Dome shaped surface mount base ; Breakaway U-Channel Mounting Device with dome shaped sureface mount base, for use with 2 #/ft post in concrete ; Replacement Top Shear Section with 5/16" bolt ; 2-1/2" OD heavy-duty anchor & 26" sq. tube anchor extension .