A new product from Blap! Models and made in association with Goodman Models for sanding work. This multi-pack set come with 6 grades that are color coded.

They are made from 1/4 inch cast acrylic sheet, double sided and in grades of:

80
180
220
320
400
600

All are waterproof except for the 80 grit.

The set is priced at $20.00 (US) with $10.00 flat rate world shipping and can be ordered from the Blap! Models webstore.

Blap! Model's has a demonstration video here of the product.