Multipurpose Replacement Parts: Set of 13 black EPDM rubber diaphragms compatible with most aquarium air pumps and oxygen pumps. Top Quality Material: Constructed with durable and long-lasting EPDM rubber, ensuring the air pump operates smoothly and quietly. Easy Installation: Designed for hassle-free replacement, these diaphragms can be easily installed in your existing aquarium or oxygen pump. Wide Compatibility: These replacement parts are compatible with various aquarium and fishing oxygen pumps, making it a versatile choice for your needs. Automatic Operation: The air pump is designed for automatic operation, providing consistent airflow for your aquarium without any manual intervention. 13pcs Aquarium Diaphragm Air Pump Accessories for Aquarium Air Oxygen Pump Aquarium Pumps and Filters Oxygen Pump Replacement Parts for Filters Fishing Silicone Cup Parts Replacements