All-in-one test tube clamp, no supports required

Hello, here you have a clamp to use as a test tube holder, which does not require any type of support and is very easy to print, I have been using it for a while and I have not had any problems, I printed it with 3 and 4 perimeters and even with 2 and no problem with it, greetings and I hope it is useful

Clamp for holding test tubes from 10 to 20 mm, without problem, very easy to print and cheap, I have printed it in PLA and PETG, and without any problem with both materials

Layer height 0.25

20% infill

No supports