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 cartBubbles/Vials Accessories, InclinometersRAVF 100/5 Bubble $38.50 Add to cartInclinometers, Percent/Grade ModelsModel 006S $52.25 Add to cartDegree Models, InclinometersModel 76 $31.90