Types

• Type W: Figures horizontally arranged (Figure sequence L, M, R)

• Type S: Figures vertically arranged (Figure sequence U, M, O)

Identification No.

Aluminium AL

Natural colour anodized

Black imprit with numbers and scale

Etched (i.e., aluminium coloured)

Imprint resistant to weak acids and lye

Solutions, and against solvents in the event

Of brief contact