Overview Reviews Product Description The welding hose fittings are designed for welding and cutting where oxygen and acetylene are used. Along with our hose inserts and collars, we carry the necessary unions, nuts and adapters for connection. Greenline Industrial Fitting Catalog New Greenline Industrial Fitting Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × Greenline 3/16" Brass Welding Hose Collar G4-019 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *