This Delta Cache Kit includes one 1.2 GPM Junior sized California economy flow aerator and the Neoperl key needed to instal and service it. This aerator has a thread designed to fit Delta faucets.
The aerator key included in this Delta Cache Kit is designed to install and remove Junior size cache aerators which are size M21.5 x 1. Neoperl model 16 0181 0.
EC Part Number: #66725
Manufacturer Number: 16 0181 0
Manufacturer: Neoperl, Inc