Overview Reviews Product Description Eaton 667 Compression Coupling Material: Plated Steel Size: 3 Inch ETM. Product Videos Custom Field Size 3 Material Steel Product Reviews Write a Review Write a Review × Eaton Eaton 667 Compression Coupling Material: Plated Steel Size: 3 Inch ETM Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *