50mm Diameter Double Concave Spherical Lenses - Rapid PH30078/6, A double-concave spherical lens with a focal length of 300mm and a power of +3.3D. Rapid Double Concave Spherical Lens- Diameter 50mm - Fl 300mm
IWOOT - Stuff you really, really wantWith biodegradable confetti, this cannon contains pink confetti signifying the arrival of a little girl, safe in the knowledge you are doing your bit to protect the environment.
Eisco Friction Rods - Eisco PH0851, A polythene rod for use in physics projects and electrostatics. Eisco PH0851 - Polythene Rod - 300mm