THE D.D. ADAMS OVER-UNDER IS A DOUBLE SIDED (GLASS OVER SLATE) CALL.  THE GLASS SIDE OF THE CALL "WORKS EVEN ON THOSE WET RAINY DAYS" WITH OUR SPECIAL CUSTOM D.D ADAMS THE LEGEND WATERPROOF STRIKER WHICH IS INCLUDED WITH THE CALL!  THE GLASS SIDE ON THE TOP GIVES YOU HIGHER PITCHED SOUNDS AND THE SLATE BOTTOM SIDE GIVES YOU MORE DEEPER SOUNDS GIVING YOU EXTREME VERSITILITY TO LURE THAT BIG WARY GOBBLER INTO RANGE!  CALL IS 4" IN DIAMETER.