Research-Grade Physics Viewing Accessory Meter Stick for Optics Work, SKU OBMST1, is a United Scientific Supplies product for laboratory, educational, research, or quality-control use. The Research-Grade Physics Viewing Accessory Meter Stick for Optics Work supports routine laboratory workflows. Precision-molded for consistent performance and repeatable results. Engineered for durability in demanding industrial and laboratory environments. Compatible with a wide range of standard scientific setups and apparatus. Constructed from high-grade materials resistant to common laboratory reagents. The listed specifications include pack quantity of 1, dimensions of 40.0 x 1.0 x 0.5 (in), weight of 0.2 lbs (lbs). For purchasing records, the country of origin is listed as India. The row does not identify the item as autoclavable. Related use terms in the row include OPTICAL BENCH, CANDLE, METER STICK, OPTICS, LIGHT. In equipment-based workflows, this item supports classroom demonstrations, laboratory setup, measurement, or sample processing according to the stated use. Its main advantage is optics-focused hardware for visual instruction, magnification, or light behavior demonstrations, which makes it a better fit for physics education, classroom experiments, and bench demonstrations involving lenses or optical paths than a more generic alternative. The difference is mostly functional: Compared with general lab accessories, optics tools are selected to control viewing, magnification, or light interaction in a demonstrable way. 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.