Comparative Terrain Landform Model Set with Mountain Overlay, 23.5", 2-Piece Subcategory_Magnetism this metal-cased spectroscope pairs a

this metal-cased spectroscope pairs a 600 lines/mm holographic replica grating with sample vials and mount

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

sized as a generic spare in the PH1118 demonstration-meter scale series for swap-in classroom use

Metal rider measuring 60 x 50mm

and concentrated oxidizer monitoring in water-treatment workflows

Comparative Terrain Landform Model Set with Mountain Overlay, 23.5", 2-Piece Subcategory_Magnetism this metal-cased spectroscope pairs aPaired 23. 5 inch cross section models with a removable ancient mountain overlay, revealing how erosion, deposition, and tectonics reshape terrain over geological time.