Road PQC Texture Brush Natural silica sand from Ottawa, Illinois designated AFS 50/70 sand graded to pass a sieve and retained on a with Small plastic or metal containers for storing the required weight of sand for a single test. Road PQC Texture Brush The container interior must be designed to permit emptying entire weight of sand for a single test. A 3 oz. tinned metal ointment box would be satisfactory. #Road PQC Texture Brush D ... Continue