This product is a lot of vintage old laboratory slides made of glass, along with filter paper, cover glasses, and lower tubes. The slides are blank and were manufactured in the United States. This collection of microscope parts and accessories is perfect for those in the healthcare, lab, or dental industry looking to add to theirmicroscope slides and slide covers. The vintage nature of the items adds a unique touch to any laboratory setting. These are a vintage lot! You are buying all this lot! The paper that’s in the yellow envelope has some staining on it shown in the photos above! Some of the boxes have marks also. Everything is in the boxes that should be Thanks for looking!