Flat belts buckles - 25,30mm - very strong design

Hi, this is a 31mm flat belt buckle with multiple uses for 30mm belt. Very strong design, there are 2 version, 3.2mm wall and 4mm wall for extreme use. 

In the video below, I show the resistance of the 25mm belt version and follow the assembly and where to find the spring easily.

Optimized for 0.4 nozzle.

Suggest print:

• Print in ABS, Nylon, PC, HIPS
• layer 0.2
• For 4mm wall version: set 5 perimeters (wall 2mm)
• For 3,2mm wall version: set 4 perimeters (wall 1.6mm)
• infill 100%