6-Piece Steel Spring Set with Looped Ends Lab Supplies_Spring Scales Six-lens optics set of three

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

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

Nine-piece stainless steel hooked weight set spanning 10 to 1000 grams in a polished wooden storage block

Standard rheostat at 2

with banana-plug terminals for optical-bench and physics-demonstration circuit setups

6-Piece Steel Spring Set with Looped Ends Lab Supplies_Spring Scales Six-lens optics set of threeSix 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.