Feeler Gauges, Vernier Calipers -Aluminum Alloy Triangular Architectural Scale Drawing Ruler Tool, Black S Highlights Generic Brand Aluminum Alloy Triangular Architectural Scale Drawing Ruler Tool aluminum, black S Description: 3 sides with 6 different scales Professional quality for high accuracy Color-coded grooves for quick and accurate selection of the desired scale Made of premium aluminum alloy, high quality, durable Perfect for architects, engineers, students, contractors, drawing and measuring specification: Length: approx. 32.4 cm / 12.76 inch Scale: S: 1:20, 1:25, 1:50, 1:75, 1: 100, 1:125 L: 1:100, 1:200, 1:250, 1:300, 1:400, 1:500 Material: aluminum alloy Color: as shown Package includes: 1 piece triangular scale