B-grade molds are new, never used. B-grade molds have small imperfections and most will be covered up with a layer of clear coat.
The imperfections can include any of the following:
-cosmetic imperfection (dust and specks inside the mold)
-smudge on mold surface
This listing comes in a set of 4 coasters. You will receive all the molds shown in the photos. Coaster molds range from ~4-4.5 inches.
Mold details: https://ellafulmolds.etsy.com/listing/1201716910/abstract-shapes-coasters-silicone-mold
B-grade molds are final sale.