Description The #141ME 4″ Plastic Slide Caliper can measure inside and outside dimensions of rods, plates, and tubing. Made of high-strength fiberglass-reinforced plastic (FRP) Sized to slip in your pocket Etched and filled graduations Opens to 3″ outside measurement capacity. 4″ rule is graduated in 16ths on the back. Inside/outside readings graduated in 32nds/mm.
