Review on Polyform A Series Buoy: Durable And Dependable Marine Flotation Devices by Duane Mann

Do not get a 1/2 inch adapter for your hose. It ifs just a touch too big and gets water everywhere. Do the 3/8 should work. I ordered a 1/4 inch which should easily fit and allow for air exchange as it gets fuller.I have the 15 inch (I think it could be 14.5) this will get the job done. The tear drop design is great for uppercuts. I think 17 inch is ideal but much heavier. I can take this one down when I need to. Most heavy bags are around 14-16 inches. 17 in would be better for body shots because it is also longer . And yes, I'f you have the space and don't need to take it down, get a 21 inch. I would guess it's about 200 lbs not including the force of hitting it. The 15 inch ifs great for versatility and, even though heavy, it's manageable.The 4 stars vs 5 was because the shipping was lousy. It was maybe delivered on ebay on the 25th. The only reason I wad able to dispute it wasd because in the UPS website, it was not delivered and scheduled for the 30th. Then it was delivered to a pick up location instead of my home which I did not authorize. ebay, as usually were very helpful and ordered a replacement. I canceled it because I was able to pick up the original.