Overview Reviews Product Description Long-carriage, duel heavy-duty universal gun for CESS and CESU, not for: CEPB or Mini Twins. 18-to-1 Ratio. Product Videos Custom Field Product Reviews Write a Review Write a Review × Crest Universal Long-carriage Gun (GF21) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *