Ford 1 Wheel Cylinder Repair Kit 91T-18372 for 1 1/2 Ton 4x2 trucks. This is a new old stock part.
For Ford Trucks years 1939-1940.  In factory sealed original can, never opened.  The can is 2 1/4” diameter x 2 1/2” high.   This kit was found in a parts bin, and the kit you see pictured is the kit that will be sent to you.