#9700 HDR 23 1/8 x 4 1/4

John Deere solder-on tank kit

The top tank has a 2" diameter hose connection, and the bottom tank has a 2 1/8" diameter hose connection.  The top tank has four mounting bosses with rubber inserts, a hole for a filler neck, and a 1/2" NPT flange for a sight glass.  The bottom tank has a 1/4" NPT flange for a drain on the bottom of the hose connection.   Individual tanks #4295 (aka 3047)  (top), and #4290 (aka 3048) (btm).
Steel version #080808A.