Convex Mirror, Material: Glass, round, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, Bulk lens and mirror sets available, Size: 2in Diameter, 50mm Focal Length, 2.8mm Thick
Concave Mirror, Material: Glass, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, Bulk lens and mirror sets available upon request, Size: 3in dia, 75mm Focal Length - 3mm Thick
Fluval Bio Clear, Clears organic debrits, Controls new tank syndrome, Safe for all aquarium inhabitants, To prevent cloudy aquarium water and reduce maintenance, use Fluval Biological Cleaner regularly, For freshwate