6-Piece Steel Spring Set with Looped Ends Lab Supplies_Spring Scales Extending up to 65 feet

Extending up to 65 feet from a 20cm closed height on the included wooden stand

Blue 300mm 2mm-stackable lead with nickel-plated split-hollow pins

this air-cooled rheostat carries a slide-bar carriage on a vitreous-enameled tube for variable resistance under thermal load

Six-lens optics set of three double-convex and three double-concave glass lenses with ground beveled edges

6-Piece Steel Spring Set with Looped Ends Lab Supplies_Spring Scales Extending up to 65 feetSix spring steel set with looped ends across six sizes, producing a spread of spring constants for Hooke's Law and mass spring comparison work in introductory mechanics.