View cart “#TL Twin Bubble” 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 cartInclinometers, Percent/Grade ModelsModel P100P $61.60 Add to cartDegree Models, InclinometersModel 003S $77.00 Add to cartBubbles/Vials Accessories, Inclinometers#TL Twin Bubble $5.50