US$ 148.99
a step up from the 70mm model with extended pole separation that gives field-mapping experiments more room along the magnet axis
5 mm inner profile
each lens stowing into the housing for pocket-portable classroom
the classic demonstration of differential radiant-heat absorption
Four nesting aluminum pails on insulating feet
Steel Folding Quadrat, 0.5m Square Length_75mm a step up from theBolt together folding quadrat of white coated steel rods, forming a half meter square for ecological field sampling and population count fieldwork.
US$ 148.99
US$ 17.95
US$ 17.95