La Pavoni Lever Sight Glass Upper/Lower Nut (Chrome) OEM Part No. 2120043451
These replace the old plastic nuts, if you still have them. When installing take care not to overtighten or you will break the sight glass.
Used as standard on the La Pavoni Stradivari Lusso STL and STH and the Stradivari Professional SPL and SPH. The La Pavoni Europiccola EN, EL and ELH. . The La Pavoni Professional PN, PL and PLH. The La Pavoni Romantica GRL and Stradivari Gran Romantica SGR.
Also use with the Gaggia Factory G105 and G106