15mm Mini Boss Head Clamp Pack Size_7 and camera lenses without scratching

and camera lenses without scratching

45mm diameter

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

this silk square gives friction rods a strong positive charge for triboelectric and electrostatic demonstrations

Open-top cylindrical dropping funnel in borosilicate glass holds 50mL with PTFE key stopcock for controlled liquid addition in chemistry procedures

15mm Mini Boss Head Clamp Pack Size_7 and camera lenses without scratchingCompact metal mini boss head sized for 15 mm rods, connecting lightweight clamps and accessories to retort stands in small scale laboratory assemblies.