Materials: We go through lots of different samples, including liquids, metals, etching, colours. For example, we even check types of glass used. Sometimes we prefer 'hard', other times we specify borosilicate glass.
Making: We then specify the exact type of 'decoration' - the ceramic lines to indicate readings. These lines are then permanently baked for durability (you'd think we describing a cake baking recipe here!)
Testing: Each spirit level is hand tested and using a precision machine. We've been known to reject quite a few. Rest assured you will received hand-checked, calibrated bubble level - one we would use ourselves. No generic items here.
Gift Box: We also include a gift box, just to keep it protected at all times. Each bubble comes with our own in house brand mark of approval - the caterpillar.