La Pavoni Lever Sight Glass Upper/Lower Nut (Chrome) OEM Part No. 2120043451 These chromed metal nuts replace the old plastic ones, if your machine still has them. When installing take care not to overtighten or you will break the sight glass! Used as standard on all domestic La Pavoni Lever machines. Also use with the Gaggia Factory G105 and G106 The Espresso Shop is an official distributor for La Pavoni coffee machines, grinders and spare parts. We also carry out all warranty work here in the UK. The Espresso Shop is a one stop shop for everything you need now and in the future for your La Pavoni coffee machine or grinder. We stock spare parts at our warehouse where we have a dedicated workshop that can service and repair your machine or grinder. We also honour the warranty on La Pavoni domestic coffee machines and grinders purchased in the UK; if there is any issue with your domestic Pavoni coffee machine or grinder you can send it to us. Find all La Pavoni Machines Grinders and Spare Parts HERE.