15cm physical caliper for teaching and experimentation, measuring vernier scale, stainless steel, millimeter 0.02mm precision caliper

The laser-engraved line design with a precision of 0.02 mm ensures that the ruler body is flat and smooth, gliding effortlessly without obstruction. The outer diameter, inner diameter, and height are easy to measure, and the overall chrome plating process is exquisitely crafted. Made of stainless steel using modern technology, the ruler body has a chrome-plated, rust-resistant surface treatment, and the measuring surface is hardened for durability. The tail with depth measurement function is cleverly designed and concealed in the inner groove. The anti-slip push wheel design makes measuring more convenient.