WaveMaster Century punching bag for martial arts. I believe it's height adjustable. We've had it for 6-ish years and it has a lot of life left in it. The bottom is stabilized with water. I think it's similar to this one: https://www.amazon.com/Century-Wavemaster-XXL-Training-Blue/dp/B000EZYT8U/ref=ast_sto_dp_puis?th=1
Help, we want our garage back!
53” tall
Can be raised to 63”
22” diameter at the base