A: We do not have a mph for wind as we do suggest that any temporary structure should be take down in an wind or any harsh weather
A: It is suggest to put dirt or small rocks in the bags
A: No unless the blocks are small
A: I got 4
A: I bought these a few years ago. You get 4. I use them around a gazebo with larger 'legs'. We filled with sand.
A: There are 4. But each one has a double cylinder for sand.
A: 4 bags. Fill with play sand and works great.
A: You need to fill them yourself.
A: You get the sand and fill it
A: You must provide your own sand. I have had mine for many years, and I am very pleased with them.
A: They come empty and then you fill them yourself with sand. They are sewn together so they would hold water for only a short while. Sand would be your best option.
A: No, you need to purchase your own sand.
A: You need to add the sand
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