This is a new old stock MDC ISO NW40 KF to NW16 KF Straight Tube Nipple Reducer.  It is a single piece construction Kwik-Flange to Kwik-Flange reducer for high vacuum applications.

The MDC Vacuum Products part number is 732001.

Main Flange:  2.16” OD

Reducer Flange:  1.18” OD

Tube OD:  0.75”

Height:  1.57”

Sold “as pictured/as seen”.

See the photos and judge the condition for yourself.

Message me if you need additional information or photos.

This item comes from a smoke-free and pet-free home.