Pale Masonite Boards from Apollon GoTrick are 3 mm think.
Apollon-Gotrick
Apollon Birch boards - 11 X 14 Inches
Massonite Panels - Canvases & Panels - Surfaces & Easels
Apollon Gotrick Gallery 1-1/2 Liquid Art Panel 10 x 10
Apollon Gotrick, Products
Apollon Birch boards - 11 X 14 Inches
Apollon Gotrick- Birch wood panel 1 5/8 profile – Foto Shop. Gallery
Substrates - Art Noise
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Richeson Masonite Boards
APOLLON GOTRICK PALE MASONITE PANEL 3MM 18X24 - The Gilded Rabbit
Apollon Gotrick- Birch wood panel 1 5/8 profile – Foto Shop. Gallery