100-Pack Nickel-Plated Dissection T-Pins, 2 inch Manufacturer_hBARSCI Hand-driven Newton's color disc that

Hand-driven Newton's color disc that spins seven painted segments fast enough to merge into apparent white through persistence-of-vision and additive color mixing

the thinnest gauge for mounting the smallest and most delicate insect specimens in permanent displays

producing oxygen's characteristic emission lines for spectroscope viewing of atomic-emission and quantum-energy levels

visible crankshaft

5 mm in diameter

100-Pack Nickel-Plated Dissection T-Pins, 2 inch Manufacturer_hBARSCI Hand-driven Newton's color disc thatNickel plated T pins provide secure specimen pinning with broad heads for stable dissection board mounting in biology laboratories.