3D printed, plastic, 2.5 inch from flat to flat, hollow.
Other customizations just ask. 
Also shown in 12mm tall hexagon (1/2 inch tall).
Slopes are also available and will be listed soon.   
Product is emailed after checkout.
Print as many as you like for your own use not for resale, hence the initial cost. 
As this is a digital product no refund is available.