The included design is the one on the left in the pictures and is the 3rd revision. You will need to print 2 of them for a set.

This paper towel roll holder is sized for rolls up to about 130mm diameter (I sized it for viva giant rolls). The holders are simply taped (preferably using VHB or similar tape) to the desired surface. Use the rolls you will be using as a spacer to accurately space the holders. They can be mounted in many configurations; Under cabinet, on table top, on back wall or side wall (and if you really want at any arbitrary angle on a surface!).