Two Parallel Necks Multiple Adapter, 19/26 Socket and 19/26 Cone, Borosilicate Glass Lab Supplies_Spring Scales expanding and closing to suit

expanding and closing to suit different optical-component sizes on a single bench-mounted holder

this 1000mm red wire with crocodile clips at both ends extends color-coded patch wiring across the longest bench setups

producing distinct audible pitches at varying spin speeds to relate rotational frequency to perceived sound frequency

Eight color filters - cyan

5-inch needle-pointed stand grips a 3/4-inch-wide bar magnet upright for hands-free study of attraction

Two Parallel Necks Multiple Adapter, 19/26 Socket and 19/26 Cone, Borosilicate Glass Lab Supplies_Spring Scales expanding and closing to suitMultiple adapter in borosilicate glass features two parallel necks with 19 26 sockets for connecting multiple components in chemistry apparatus.