Technical STEM Measurement Apparatus Introductory Optical Bench Set, SKU OBSET4, is a United Scientific Supplies product for laboratory, educational, research, or quality-control use. The STEM Measurement Apparatus Introductory Optical Bench Set, is designed for laboratory use. Compatible with a wide range of standard scientific setups and apparatus. Engineered for durability in demanding industrial and laboratory environments. Constructed from high-grade materials resistant to common laboratory reagents. Ideal for technical education, research, and quality assurance workflows. The listed specifications include dimensions of 32.0 x 5.5 x 2.5 (in), weight of 3.0 (lbs) (lbs). For purchasing records, the country of origin is listed as China. Related use terms in the row include Physics, Optics, Lenses, Mirrors. In equipment-based workflows, this item supports classroom demonstrations, laboratory setup, measurement, or sample processing according to the stated use. That depends on the procedure and material, but it is generally selected when STEM lessons, physics labs, and hands-on experiments that benefit from direct observation is part of a repeat workflow. Labs pick this version when instructional apparatus for demonstrating measurable physical principles in a repeatable way matters more than using a broad general-purpose substitute. For equipment or apparatus purchasing, confirm the stated specifications, operating limits, and any product documentation required by the lab before use. The row indicates California Proposition 65 applicability, so applicable warning language should remain visible where required. United Scientific Supplies provides applicable CPSIA/CPSC compliance resources for covered items and general compliance statements for items where GCC documentation is not required.