O-ring for garden hose adapter

As for me, 95 is a bit hard for the O-ring, it is better to use a softer plastic.

Outer diameter - 16mm

Section diameter - 2,5mm

Printing:

Material - BF TPU SOFT (TPU-95A) 

Layer Height - 0,1mm

Infill - 100%

The adapter in the photo: Hose Quick Connector Male to 3/4" BSP by steveprusa1502 | Download free STL model | Printables.com