These 6mm target domes are meant to be put around parts on tabletops, floors, or unthreaded turntables - scan at significant shallower angles, allowing you to get more coverage per scan. You’re able to place your scanner almost parallel to the scanning surface and still maintain tracking. Compatible with my double sided adhesive dots for mounting on vertical surfaces. Quantity of 24 in a protective case. Made from glass filled Nylon. Comes with a sample sheet of adhesive dots. Default reflective targets are SCANOLOGY brand. E-mail me for different target types.