Compatibility: This manual air release assembly is compatible with all for Pro-Grid DE (Grid) filters, Swim Clear and Swim-Clear filters. Installation: To replace this product, remove the old air release assembly. Clean any dirt or debris you may notice and insert the replacement air release assembly. Lubrication of the outer ring is recommended but optional. Lubrication is not included. Upgraded Design: This product features a pressure gauge designed to let the homeowner know when to clean the filter. Included: This product includes all necessary gaskets and washers. Installation: To replace this product, remove the old air release assembly. Clean any dirt or debris you may notice and insert the replacement air release assembly. (Lubrication of the outer seal is recommended) Replaces Part Number: 2420MAR2. Colour:Black Material:Plastic Package Contents: 1x Filter 1x Gasket 1x Gasket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.