Density 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
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
Marina air stone is ideal for adding accents in any aquarium the air stone diffuses air, creating water movement. The air stone also increases surface agitation, accelerates oxygen replenishment and helps release
Marina air stone is ideal for adding accents in any aquarium the air stone diffuses air, creating water movement, increases surface agitation, accelerates oxygen replenishment, release carbon dioxide build-up, Rec
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
Density 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
Marina T Connector allows to split air coming from the air pump into two even and constant air streams to separate air-driven devises in aquarium. The plastic and non-corrosive connector is safe for use in salt water aq
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
Marina air stone is ideal for adding accents in any aquarium the air stone diffuses air, creating water movement. The air stone also increases surface agitation, accelerates oxygen replenishment and helps release car
Concave Mirror, Material: Glass, Round, designed for physics and educational uses, thickness varies as they are not designed to be consistent in that respect, Because of their educational use design, there may be minor imperfection, Size: 1.5in Diameter, 150mm FocalLength, 2mm Thick
Concave Mirror, Material: Glass, Round, designed for physics and educational uses, thickness varies as they are not designed to be consistent in that respect, Because of their educational use design, there may be minor imperfection, Size: 1.5in Diameter, 200mm Focal Length, 3mmThick
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
Convex Mirror, Material: Glass, round, designed for physics and educational use, Because of their educational use design, there may be minor imperfections that do not affect physical function, thickness varies as they are not designed, Size: 2in Diameter, 300mm Focal Length, 2mm Thick
Double Convex Lens, Highly polished, optically true lens is excellent for physics classroom demonstrations in optics and light refraction, with ground edges, great for physics classrooms, with highest grade, Size: 250 mm focal length, Lens measures 1.5in diameter, 0.2 weight
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, thickness varies as they are not designed, Size: 2in Diameter, 300mm FocalLength, 2mm Thick
AquaClear 50 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
Nutrafin Basix 3-Day Fish Feeder is specifically formulated to provide aquarium fish with nutritious food and multi-vitamins for up to 3 days, rich diet complete For larger aquariums, community aquariums up to 37.
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, 100mm Focal Length
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, Optically worked, silvered back with protective coating, Size: 2in diameter, 75mm Focal Length
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