No more disappointing small and broken pellets for your classroom dissection! These are the best of the best, selected out from the 1000's of pellets we grade weekly. These are premium pellets, measuring 2 inches and larger, containing at least one prey remains and often many more. This classpack contains 15 extra large owl pellets and bone sorting sheet. Mountain Home Biological has been supplying pellets since 1994. All pellets are sorted, dried, heat treated and wrapped in our facility in Bingen, Washington and monthly samples are submitted to an independent lab for testing.