Overview Reviews Product Description NATURAL GAS ORIFICE 0.028 IN. HOLE DIAMETER Q179A,B.Honeywell Process Solutions products are only available in some markets. Please call for more information. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Honeywell Honeywell 395390-28/U Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments