These are ProTeam factory filters for the ProTeam GoFit 3 backpack vacuum. This is the open collar style of bag.
Bag capacity is 3 quarts (3.3 Liters) and come 10 per pack.
These are disposable filters and not to be re-used. The factory recommendation is to change the filter bag when it reaches 3/4 full.
ProTeam replacement # 107666.