Rexius fine grade fir bark is the only bark which is heated to to completely destroy fungi, bacteria, insects and snails. Pre-soak for 24 hours before use as this material is very dry. This is a very fine grade bark that is often used for pre-mature flask seedlings to small seedlings. The particle size is from 1/8 to 1/4 inch. Approx. FedEx Ground shipping on 1 bag: $15-25+, 2 bags: $35+, depending on region.