Designed for usage with 40 x 14 mm labels (I'm using the Niimbot D110). Samples in pictures were printed on MK4S.

Features:

• Five steps (.15, .3, .5, .7, .9mm) of filament thickness

• Simple stringing test

• Grill test

• 42x15 sticker space

Design files avaliable on Onshape (link, requires login)