Overview Reviews Product Description Thomas and Betts TK122A Coupling Material: Zinc Plated Steel Size: 3/4 Inch EMT. Product Videos Custom Field Size 3/4 Material Steel Product Reviews Write a Review Write a Review × Thomas and Betts TK122A Coupling Material: Zinc Plated Steel Size: 3/4 Inch EMT Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *