WARNING! This Board COMES WITH an inbuilt attachment allowing it to be used with SOLO Easel. If you are looking for a board to work without SOLO Easel, here it is:
PVC Foam Watercolor Board for Half Sheet

Watercolor PVC Board.
Lightweight and durable, it does not absorb water.
Dark gray, almost black, matte surface.
These are the boards that I always work on.
Dimensions: 43 x 61 cm (17 x 24 in.), 6mm (15/64 in.) thick.
Has a mount for use as a part of SOLO Easel.
Perfect for comfortable work with half a watercolor sheet.
PVC offers an excellent balance of strength and weight and is typically resistant to acids, alkalis, and most other inorganic chemicals
 
To know more please visit Solo Easel website: soloeasel.com
 
Weight: 900 g (2 lbs)
 
Also please check the Bag for PVC Foam Watercolor Board for Half-Sheet
 
ATTENTION! All the items except the PVC watercolor board are just shown for demonstration purposes, they are purchased separately.