This is a Maytronics Ultra-Fine Filter Bag 50 Microns for specific Dolphin pool cleaners. Models include the 3001, 2×2, and Heavy-Duty.
The Ultra-Fine Bag is great for picking up small debris like soot or sand. Dolphin Filter Bags trap all the dirt and microfilter the pool water. It’s like adding a DE Filter to a pool. These bags are machine washable and fit most commercial models.
