Previous Product Next Product #BL Round Bubble $5.50 30mm diameter bubble. 3 hole mounting base. #BL Round Bubble quantity Add to cart SKU: #BL Categories: Bubbles/Vials Accessories, Inclinometers Description Description 30mm diameter bubble. 3 hole mounting base. Related products Add to cartDegree Models, InclinometersModel 76 $41.80 Add to cartDegree Models, Inclinometers, Safe Curve Speed Indicators, SlopemetersSafe Curve Speed Indicator $595.00 Add to cartDegree Models, InclinometersModel 15S $61.60