Zodiac Ranger Diaphragm Chamber A&A Gamma 3/4 Collars it acts as a protective

it acts as a protective cover for these parts

Zodiac G3/G3 Pro Long-Life Hose Kit

Inspect the collar and O‑ring when replacing this head—if you’re running a variable‑speed pump or planning future upgrades

If your Sensor Plate uses bent tabs then you will need the Black Sensor Assembly

Zodiac Ranger Diaphragm Chamber A&A Gamma 3/4 Collars it acts as a protectiveZodiac Ranger Diaphragm Chamber (W81741) The diaphragm chamber is a replacement part made by Zodiac. It is manufactured from the same high grade plastic material as the original factory part. Making this a genuine OEM product. The diaphragm chamber was designed to be the housing unit for the above ground cassette diaphragm. It also acts as a protective cover for the diaphragm chamber ensuring no outside influence can disrupt it during the cleaning