Overview Reviews Product Description 4100 series reusable couplings are used for 157 and 157 Teflon® hose in high temperature applications such as air compressor connections. Pulsar Hydraulic Hose & Fittings 10th Edition Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × Greenline 1/2 x 1/2" Pulsar 4100 Series Teflon® Reusable End - Male NPT 4116-08-10 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *