For me one of the products I was hoping for. It is not. He just has enough power. I suspect the black one looks more like a lacrosse ball, but that's just a guess. The space between each ball is perfect for me to roll up and down my spine. I opened it up, lay on the floor and rolled out my spine. about 5 minutes. My wife said it must hurt and I said no, the sounds I'm making are release sounds. It's good. Like a free massage. It was wonderful. If you are new to the world of myofascial release I would suggest getting the green one as it has free returns. If it's too soft, send it back and buy this blue one. If you're used to this type of work, choose blue if you want a little give and black if you want pressure at the level of a lacrosse ball (assuming it's black). Yes, it's a little pricey, but I'll get years off of it. thing, so I'd rather go with the gold standard.
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