I don't know what liquid is in it but it doesn't really help form a hard bubble. It keeps forming 2 or more bubbles and I have to shake it several times until it merges into one. Have never seen a level with this problem. Too cheap to bother with returns, threw them in the "probably never use again" bin.
Laser level Zitrek LL1V1H
36 Review
Gaming chair AeroCool Baron, upholstery: imitation leather/textile, color: steel blue
35 Review
Accurately Measure Angles And Levels With GemRed XVB Digital Gauge Level Box For Pipe Conduit
25 Review
Cullaby Contour Gauge: 10 & 5 Inch Duplications For Perfect Templates Of Curved And Odd Shapes, Plus Bonus Angle Ruler & Carpenter Pen!
23 Review