Overview Reviews Product Description Sprocket for the Overhead Door RMX commercial operator. 18 Tooth, 1/4P, 3/8" bore Product Videos Product Reviews Write a Review Write a Review × SPROCKET (RMX) Review Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments * Recaptcha: