These 3/8in Thick Bases are cut from the best Cell Cast Acrylic you can get. Known for its optical clarity Cast Acrylic is a very high grade material. These are all cut in house here at Spot On Laserworks LLC to order. We are proud to bring you the best products we can with Customer Service that exceeds all your expectations! PLEASE NOTE: The 1.2x1.2 (Perky Box) Hexagons do not fit in a Perky Box.If you don't see something you need we do Custom cut so any Size,Shape, Rectangle, or Dimension from 1/8in-1/2in Thickness is possible. Please fill out a contact form and we will take care of you!