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V2 is out!

The following internal diameters are currently available:

20 - 22 - 25mm

if you want other variations ask in the comments 

Print settings:

• Nozzle: 0.4 mm
• Loop: 4
• LH: 0.2
• LW: 0.4
• Solid layers: 5
• Infill 15%

I tested printing up to 200 mm/s - acc 10k

it is important to have a well-calibrated printer and not to have seams that are too thick

V2 Changelog:

• less space between the outer and inner ring
• infinite possibilities of available inner diameters
• possibility of having a thicker or thinner ring (z height)

if you have any requests write them in the comments