La Pavoni Lever Brass Sight Glass Washer OEM Part No. 313004 ø 14.5x9.5x1.5mm Situated between the sight glass seal and the sight glass nut to help evenly compress the silicone seal. 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 in Glasgow, Scotland and 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.