These are drop in and can be used in any series VI adapters. Glass is clear and clean. I don't detect any noticeable scratches.
VINTAGE KODAK SERIES VI 1 1/4 IN-31.5MM CAMERA LENS ADAPTER RING (EXCELLENT)
Vintage Kodak series VI 39.5 mm push-on adapter and lens shade
Kodak Series VI Portra Potrait Lens 3+ Front Made in USA mjb
VINTAGE KODAK SERIES V TO VI ALUMINUM STEP-UP SCREW-ON LENS ADAPTER
(9) Vintage Kodak Series IV V VI Filters & Adapter Rings
VINTAGE KODAK SERIES V TO VI STEP-UP LENS ADAPTER & RETAINING RING
