Pale Masonite Boards from Apollon GoTrick are 3 mm think.
Gotrick Inc – Hues Art Supply
Apollon Gotrick Products — Wallack's Art Supplies & Framing
Boards - ARTiculations
Apollon Gotrick Products — Wallack's Art Supplies & Framing
Apollon Gotrick, Products
Apollon Gotrick Gallery 1-1/2 Liquid Art Panel 10 x 10
Pale Masonite Panel - 3 mm
Apollon - Gotrick - ARTiculations
Masonite Panels — Wallack's Art Supplies & Framing
Gallery Depth Wood Panel
ApollonGotrick Artist Canvas
Apollo Gotrick - Standard Unprimed Canvas 18 X 24-Inch
Gotrick Dark Masonite Panels – Barratt's Office Pro
GOTRICK / Apollon – Tagged wood-supports
Apollon Gotrick Standard 3/4 Liquid Art Panel 18 x 24