Nichols Tillage Tools, Inc. 312 Hereford Ave , Sterling , Colorado 80751 USA About Solutions products Companies Nichols Tillage Tools, Inc. Products Model B17400 JDM - Bubble Coulters Model B17400 JDM - Bubble Coulters From Coulter Flat Blades 0 Share Bubble Coulter Blade; Dia. = 17.00; Thickness = 4.00mm; Pilot hole = 2.125 Dia.; Bolt circle = 4.750; Hole size = 0.531; Number of holes = 5 Customer reviews No reviews were found for Model B17400 JDM - Bubble Coulters. Be the first to review! Add your review Publish your review Great! review successfully added!