La Pavoni Lever Professional Upper Sight Glass Retainer (Chrome) OEM Part No. 2110045451

This fitting is designed to accept the installation of a pressure gauge.

Used as standard on the La Pavoni Stradivari Professional SPL and SPH also the La Pavoni Professional PLH. The La Pavoni Romantica GRL and Stradivari Gran Romantica SGR.
Also used on the Gaggia Factory 106