Polyform eva floater massive foam, diam.17-25cm, 3.5-9.8 ltr
EVA foam floater Polyform BPB : A very strong, shock stable and elastic material with 100% waterproof cel structure. A line or cable can be put through the floater. Applications: Fishery, offshore, dredging, anchor buoy, marker, ROD buoy and bal-line for marking swimming-area or beaches: Very strong and vandal proof!!
In one of the picture there is a table with all measurements and other data.