Overview Reviews Product Description Hubbell 2156 EMT Set Screw Coupling. Product Videos Custom Field Size 4 Material Steel Product Reviews Write a Review Write a Review × Hubbell Hubbell 2156 EMT Set Screw Coupling Material: Steel Size:4 Inch Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *