Forensic Drug Testing Simulated Immunoassay Kit for 15 Groups Build to Order Long-focal double-convex glass lens at

Long-focal double-convex glass lens at 75mm diameter and 250mm focal length

the wide aperture and longer focal distance suiting whole-page reading and broader image-formation experiments

sized for fine-print reading and convex-lens image-formation work in introductory optics

pink-dotted at one end of each magnet to flag the matching pole and supplied with steel keepers between lessons

Forensic Drug Testing Simulated Immunoassay Kit for 15 Groups Build to Order Long-focal double-convex glass lens atSimulated immunoassay drug testing kit teaches forensic toxicology through antibody reactions, chemical analysis, and medical laboratory procedures.