Got a spirit level that's taken a knock and the bubble is off, or working on a custom DIY project where you need a tiny level? This 5-pack of Mini Spirit Level Bubble Vials is the perfect fix or component. Each vial is a small, clear acrylic square measuring 29mm long by 10mm wide by 10mm thick, containing the classic liquid and bubble. They're great for replacing the bubble in small levels, incorporating into homemade tools, jigs, or projects where you need to ensure something is perfectly level or plumb. Maybe you're building a photo frame jig, a small shelf, or repairing a kid's toy level. Having a few spares is always handy. They're simple, effective, and the pack of five means you have extras for future projects or in case one gets damaged during installation. Just carefully pop out the old, broken vial from your tool and glue this new one in its place, making sure the bubble is centered when the surface is level. A super affordable and useful bit of hardware for any toolbox or workshop.