Both the Wind Sign and Flex Frame Springer are great for outdoor sidewalk signs, especially where high winds are possible. Here are a few differences: WEIGHT: Wind Sign: 26 lbs. Flex Frame: 20 lbs. SIZE: Wind Sign: 29.5" x 50.5". Flex Frame: 26" x 48". MATERIAL: Wind Sign: Gray Molded Plastic that won't rust, splinter, or fade. Flex Frame: Sturdy powder-coated black metal.. One of the key differences between the two is that the Flex Frame does not require ballasting and can withstand up to 60mph winds as is. The Wind Sign would require 115 lbs of dry sand ballasting to be added to allow it to withstand 60mph winds.
Here are the links for the Wind Sing and the Flex Frame springer: