Overview Reviews Product Description Mar-Bal R4150-A3 Red Standoff Insulator 5/16-18 x 3/8 Deep Height 1-1/2 1500V Diameter- 1-3/4 Shape- Round Aluminum Insert Glastic Part #- 2015-2A R4150A3-UA-YAG. Product Videos Custom Field Product Reviews Write a Review Write a Review × Mar-Bal Mar-Bal R4150-A3 Red Standoff Insulator 5/16-18 x 3/8 Deep Height 1-1/2 1500V Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *