Double Convex Lens, 150mm Focal Length, 2" (50mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs hidden which means it is twice

which means it is twice the size as the other pads yet small enough to keep them handy at all times

You can use for home organization

LED Light Reminding: H603 has a flashing LED light that confirms your heart rate and connection

and the lens will attach to the stick

RETENTION TAPE PREMIUM QUALITY: hospital grade Non-Woven Retention Tape for medical tubing

Double Convex Lens, 150mm Focal Length, 2" (50mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs hidden which means it is twiceDouble Convex Lens, 150mm Focal Length, 2" (50mm) Diameter Spherical, Optically Worked Glass Lens Ground Edges, Polished Great for Physics Classrooms Eisco Labs Product Features DOUBLE CONVEX Highly polished, double convex lens SPHERICAL Lens measures 2" (50mm) in diameter 150MM FOCAL LENGTH Converging lens with a 150mm focal length OPTICALLY WORKED GLASS Made of high quality, optically worked glass. Highly polished with ground edges GREAT FOR PHYSICS