1.25" (31.75mm) Hex walls for BattleTech (or any other game you can make it work on, includes level1(short)/level2(taller) terrain, and 9 total pieces for variation.

The pieces are:

Flat walls. (Short and Tall)
End Walls. (Short and Tall)
End Towers (Short and Tall, had players that wanted to run turrets/etc, the flat top tower portion is not a full 1.25" (31.75mm)
Transition slanted piece to go between Short and Tall pieces.
Designed with holes for circular magnets for snap together terrain, just double check your magnets polarity before gluing.

The "teardrop" holes will fit (2/3/4/5mm) disc magnets, I like the (5mm wide/2mm depth) personally:

After printing, check magnet polarity, set magnet in and add a drop of glue, (I'm a fan of thin CA glue).

These are designed so (almost) any FDM printer can print with no supports. The largest overhang angle is approx 50-55 degrees.

Notes:
The short and tall terrain magnet holes currently do not line up since I needed to condense the layout of the 4 "magnet holes" on the shorter pieces. I may update this later, and make it to where the short pieces only gets 3 holes instead of 4, but the bottom 5mm hole would still align.