Bottom Sampling Net for Aquatic Specimens Material_LDPE this clear dial provides a

this clear dial provides a readable face for measuring angular displacement in physics setups

Economical minute timer setting intervals up to one hour via a top knob

Six-piece laboratory-glass barware set bundles beaker shot glasses

sized so students can see the moving-coil mechanism while it reads

letting students read image height and position directly off the projected real image during focal-length investigations

Bottom Sampling Net for Aquatic Specimens Material_LDPE this clear dial provides aBuilt for stream and pond bottom sampling, this heavy rim net sifts benthic invertebrates, sediment dwellers, and bottom feeding larvae from aquatic substrates.