Massage ball perfect for myofascial release - Brand: Trigger Point - Color: Red/Black - Type: Massage Ball - Purpose: Myofascial release - Size: 6.5cm diameter Thank you for viewing. This is a Trigger Point massage ball (firm). MB-X A firm massage ball is recommended for relieving stubborn neck and shoulder stiffness. You can pinpoint and release the areas you want to target. It's lightweight (41g) and convenient to carry. I purchased it during the recent Prime Day and have used it a few times. I use it on a yoga mat. There doesn't seem to be any particular damage, but please ask if you have any questions. It will be shipped via Letter Pack Plus.