These high grade straining funnels are used to purify the gloss resin when pouring from the can into your bucket. The strainers catch all the unwanted byproducts from the resin. This is one of the key secrets in glossing. Pour resin into strainer above bucket, when it drains through you’re ready to go. These strainers are also excellent for straining your paint before spraying your board. Quantity five (5).