Description Nuts & Washers Kit. DL5-A24 If the neoprene washers deteriorate then the sight glass will get dirty. If you can not see the water level you run the risk of damaging the boiler. If you are buying a complete set or replacing more than one nut/washer you will need to order qt:2 as this price is for just the one. Part number DL5-A24 We think you may be interested in this product: Sight Glass Part No DL5-A25
