Esther, when I first put my pond in, the skimmer came with a set of brushes and a crossbar. The brushes were very stiff but the metal used along the shaft started to rust within a couple of months. That's when I ordered the Black Knight brushes from AZ ponds. Much more flexible, I can bend shape them, the bristles are much softer and they still haven't rusted. They will stand up on their own without a cross bar if you pack them closely together. I see where you can order either the 12" or 24". Have you thought about getting the longer ones and then cutting them to the size you need. You could get 2 12" brushes out of 1 24" and save some money. Even with shipping tho, I don't think you'll find them at a better price.