Features: Brand new and high quality Achieve efficient water circulations with the Directional Air Release Valves. Keep your pool system clear and clean. Designed for pool maintenance professionals and technicians, the Directional Air Release Valves is a must have tool for regular inspections and replacements. Suitable for both public and private pools, the Directional Air Release ensures performances. Enjoy a refreshing swimming experience. Upgraded your pool equipment with the user friendly Directional Air Release. Say goodbye to air build up and hello to improve water flows. Replace your old release valves confidently with this directional air release valves. Specifications: Material:ABS Type:3Pcs/6Pcs Package Includes: 2 Optional Package: Package 1 Include:3x Directional Vent Valves Package 2 Include:6x Directional Vent Valves note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.