Up for sale are 4 Barnes & Jones #1750 Cage Unit Thermostatic Steam Trap Interior.   New in the boxes.  See photos.

This B&J Cage Unit is a complete one piece thermostatic trap interior which combines element, plug and seat. 

It is designed to replace all the working parts of the trap listed on the top of this box.  1750 Trap.  Do not use in any other trap.