uxcell Office Students 15cm 6 Inch Straight Edge Ruler Measuring Tool 4pcs Weight: 62g; Product Name: Straight Ruler System of Measurement: Both Metric and Inches; Package Content: 4 x Straight Rulers Scale: 15cm, 6 Inches; Material: Stainless Steel Dimension: 172 x 20 x 0.7mm/ 6.8" x 0.8" x 0.03"(L*W*T); Main Color: Silver Gray Accuracy: 0.5mm