Epoxy-Coated Steel Wire Test Tube Rack, 72-Hole, 6x12 Grid Geology_Geology Charts & Models this two-speed ticker-tape timer turns

this two-speed ticker-tape timer turns paper tape into a visual record of distance

110 ohms via rotary selector knobs

Twelve premium rock specimens expand the introductory set with additional igneous

Magnetic base anchors the metal-cased unit to benches and steel boards

Eisco Labs proudly manufactures its own products using state-of-the-art equipment

Epoxy-Coated Steel Wire Test Tube Rack, 72-Hole, 6x12 Grid Geology_Geology Charts & Models this two-speed ticker-tape timer turnsLarge capacity blue epoxy coated steel rack holding 72 test tubes in a 6 12 grid, built for classrooms and laboratories that process many samples in parallel.