About this 3D model
I designed this ligature based on the bois ring ligature for my Martin Elkhart Alto Saxophone.. It has a groove inside to put 1/16th inch o-ring stock if you want to (glued in with superglue). With the O-ring it's a 25mm inner diameter and without it's 28mm so you may want to measure your mouthpiece beforehand to make sure it will fit and scale the model slightly if needed. If scaled slightly, it will also work for clarinets as well as tenor, soprano, baritone sax etc.