Only sold in 1/8th increments. Silver Back is a phenotype of Gorilla Glue #4. This strain is a potent hybrid that delivers heavy-handed euphoria and relaxation, leaving you feeling “glued” to the couch. Its light green, resin-covered buds fill the room with pungent earthy and sour aromas inherited from its parent strains, Chem’s Sister, Sour Dubb, and Chocolate Diesel.