Rotring Tri Ruler 6 Surveying Triangular Reduction Scale 1 25 to 1 2500 with 2 Coloured Flutings

Rulex 30cm 300mm Triangular Scale Ruler 1:1 1:10 1:2 1:20/1:5 1:50 1:100 1:200/1:500 1:1000 1:1250 1:2500 - UK manufactured

Liquidraw Metric Triangular Scale Ruler 30cm, Architectural

Helix 300mm Metric Triangular Scale Ruler, Red

Staedtler Staedtler Mars 561 98-DIN Reduction Scale Ruler Division 1 Piece on Blister Card,White,1:10 / 1:2,5 / 1:5 / 1:20 / 1:50 / 1:100

LATERN 6 Pieces Aluminum Architect Scale Ruler, 2 Pcs 12 Inch Triangular Architect Scale Ruler + 4 Pieces Triangle Ruler Square Set, for Architects, Students, Draftsman and Engineers

Rulex 30cm Metal (c) Triangular Scale Ruler 1:1 1:10 1:2 1:20/1:5 1:50 1:100 1:200/1:500 1:1000 1:1250 1:2500

SZXMDKH 30cm Triangular Scale Ruler, Metal Ruler for Architects, 1/20, 1/25, 1/50, 1/75, 1/100, 1/150 (Blue)

Rulex 30cm Black (c) Metal Triangular Scale Ruler 1:1 1:10 1:2 1:20/1:5 1:50 1:100 1:200/1:500 1:1000 1:1250 1:2500

Liquidraw Triangular Scale Ruler & Rolling Ruler 30cm Set With Mechanical Clutch Pencil 2mm, Leads & Eraser For Architectural Drawing Artists Architects Engineers

Liquidraw Metric Triangular Scale Ruler 30cm, Architectural