No.3 Verulam 300mm oval scale ruler with architects RIBA approved scales - Product No. 0313.03

RIBA approved (Royal Institute of British Architects)

Scales: Side 1 - 1:1, 1:100 & 1:20, 1:200.  Side 2 - 1:5, 1:50 & 1:1250, 1:2500.

UK manufactured for reliable accuracy.

Also available in 150mm length.