View cart “Model 15S” has been added to your cart. 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 003S $77.00 Add to cartDegree Models, InclinometersModel 10AC $61.60 Add to cartBubbles/Vials Accessories, InclinometersRPVF 80/3 Bubble $49.50