Crafted from shatterproof acrylic, these thickness measuring ruler wear resistance and effortless cleaning, avoiding the common problems of wooden or ruler that wear out or are hard to maintain These clear acrylic pottery clay thickness ruler gauge ensures accurately measurements, solving uneven thickness issues in jewelry project and perfect for pottery enthusiasts needing precisely control The clear construction enhances visibility, allowing clear observation and of clay thickness, minimizing errors caused by visual obstructions in accuracy work The compact and light weight design makes these clay thickness measuring tool easy to carry, ideal for mobile workshops or outdoor pottery classes, especially for enthusiast who frequently change workspaces This 5pcs set covers various thickness needs ( from 2mm to 6mm), suitable for different clay crafting and jewelry making project, meeting requirements from beginner to professional