A simple thee line brake clamp for automotive 3/16 line. Overall OD should be around 0.19in for a snug fit. Uses a two 4mm allen cap screw and nut to secure two brake lines. In theory you could scale for other line sizes but I have not tested it.
Printed on my Prusa MK4 in PETG on 0.10mm with 50% infill for strength. 30% would also probably be enough.
Similar to my 2 line clamp: https://www.printables.com/model/946171-316-dual-brake-line-clamp
The author marked this model as their own original creation.