Tier1 PAS-1030 Replacement Pool and Spa Filter 4 ounce media fits the Hayward ASL Full-Flo C1250 and C1500. Tier1 Pool and Spa filters feature high durability filter fabric that maintains strength even when loaded with sediment, a tighter porosity and denser weave to capture more contaminants in less time, and a high strength, high flow core designed to support the filter while providing industry leading flow rates. Tier1 Pool and Spa filters will clean your water faster and more efficiently with less wear and tear on your pump. Pleated design allows more contaminant retention and can be rinsed for increased longevity and service life. Tier1 Pool and Spa filters will protect your investment engineered to outperform the competition and exceed your expectations. Dive in with Tier1, the water's great!