Specifications and Models19-6 four quarters of sand; 37

19-6 four quarters of sand; 3719-6 four quarters of sand; 3819-6 four quarters of sandstone; 3919-6 four quarters of sand; 4019-6 four quarters of sandstone; 4119-6 four quarters of the year; 4219-6 four quarters of sandstone; 4319-6 four quarters of the year; 4419-6 four quarters of the year; 45