Enhance your fieldwork precision with the Geological Ruler from Twilight Exotics. Ideal for field use and for photographing specimens when portraying size, this essential tool is colour graduated in cm on one side, with 10cm long colour graduated blocks on the adjacent side. Crafted from hard thick plastic, it ensures durability and is entirely waterproof, making it a rugged companion for any geologist. Twilight Exotics prides itself on providing high-quality tools to support your research needs. Trust in our exceptional products to elevate your geological explorations.