This Eisco Labs 30-meter fiberglass tape measure features PVC covering for durability and a fold-out winding handle for manual retraction. Dual metric and imperial markings are printed on the tape. The zinc-coated steel case with vinyl covering provides protection. The PVC-coated fiberglass construction is non-conductive, waterproof, washable, and will not stretch over time. The 30-meter length is suitable for field measurements, outdoor experiments, large-scale physics activities, and STEM education.