Proportional scale divider: the proportional scale divider tool can align your desired subject matter in the small end of the divider and transfer the spacing of the larger end to your drawing surface Easy to use: there is a locking device so that you can keep the same proportion on your drawing Adjustable: by moving the blue tab, the scale can be adjusted from 1:1 to 1:5, adjusted for any subject size Durable materials: our proportional scale divider is sturdy and light, easy to carry and available for long-term use Model Number: proportional Type: Compasses Weight: 25g Measuring tips: 1. Use small end of divider to measure the height of the desired object. 2. Transfer the spacing of the large end to your drawing surface. 3. If want to change size of drawing, move the blue tab towards the middle of the divider to reduce the transfer size, or move the blue tab toward to enlarge the transfer size. colour:Black+purple Material:plastic size:26 x 1.8cm Package Contents: 1 x proportional scale divider Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.