Cube, Individual cubes for density experiments, Available in eight different materials: acrylic, aluminum, brass, copper, nylon, polypropylene, PVC, and steel, Each material is represented by a 1/2inch, 1inch and 11/2inch cube
Cube, Individual cubes for density experiments, Available in eight different materials: acrylic, aluminum, brass, copper, nylon, polypropylene, PVC, and steel, Each material is represented by a 1/2inch, 1inch and 11/2inch cube
AquaClear 20 Foam Filter Insert is mechanical filter media that effectively removes particles and debris from aquarium water. Prevents particulate waste from prematurely clogging other media in the filter, Designe
Fluval* Foam Pad captures large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process, inside the filter chamber to prevent debris bypass, pore size allows water
Convex 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, Optically worked, silvered back with protective coating, Size: 1.5in diameter, 50 mm Focal Length
Convex 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, Optically worked, silvered back with protective coating, Size: 1.5in diameter, 150mm Focal Length
Fluval Cycle Biological Enhancer, For fresh and saltwater aquariums, Powerful team of beneficial bacteria immediately innoculates aquarium water, Creates a safe biological habitat for your fish, Prevents loss of fis
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