30cm Aluminium Tri Scale Metal Ruler Architect Engineers Technical Rule 12"

Features：

Scale clear, built-in scale

30cm long with a protective sleeve

Scale accurate, easy to carry.

Excellent material, durable and lightweight, easy to breakage, not easily deformed, smooth lines;

Tri-scale precision for drawing paper.

Use just enough length, high contrast, easy to read engraved number.



Specification：

：as the picture

Material ：Aluminum

Weight：82g

Size：30cm/11.8

Shape：Tri

















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