PREMIUN MATERIAL: Made of stainless steel and nylon bristles, perfect for cleaning the interior of assorted hoses. Well-made nylon bristles is also not easy to pluck FLEXIBLE & DURABLE: The cleaning brushs are bendable, easy to inter the hoses, double ended brushes work in small bent pipe such and U-shape tube, remove algae and dirt build up in pipes and tubes ITEM CONTAINS: Including 1 pcs aquarium water filter pipe air tube hose stainless steel double ended hose brushes