Werner Ladder inclinometer / safety angle meter

It's convenient just by looking at the bubble and making sure the angle is right before going up. This is modeled for the 24" Werner Type 3 (200lb) extension ladder. About 3 hours to print, no support needed.

When the bubble is at the center, it is measured as 75°, which is the recommended angle on the label. When the edge of bubble touches the black inner left line, it is measured as 75.5°, OSHA recommended angle.

Make sure you have a 2nd method(phone app, digital angle meter, etc) to validate the correctness of the angle before start using it.