1.5m Metal Optical Bench Mechanics_Kinematics Lead-free five-cylinder equal-mass set at

Lead-free five-cylinder equal-mass set at 30g each in zinc

this large earthworm dissection model reveals segmentation

Nickel-plated T-pins provide secure specimen pinning with broad heads for stable dissection board mounting in biology laboratories

2A with constantan winding on a vitreous-enameled steel tube and a nickel-plated phosphor-bronze sliding contact

portable enough for mobile demonstrations of current-driven magnetic field strength

1.5m Metal Optical Bench Mechanics_Kinematics Lead-free five-cylinder equal-mass set atV location formed by two hexagonal bars and a hexagonal carriage prevents sag along this 1. 5 meter precision optical bench, with a single point central support stabilizing the rail.