Swanson SVBTS0 32-Inch and 54-Inch Savage Tub Surround Professional Box Beam Levels with Gel End Cap Kit Continuous Dual Rail Frame 029-Degree Vial Accuracy Precision Machined Gelshock End Caps Non-Magnetic Continuous Dual Rail Frame 029-Degree Vial Accuracy Precision Machined GelshockEnd Caps Non-Magnetic