1-10000Ω Plug-Type Brass Resistance Box, 17 Coils Capacity_5000mL Dual-screw adjustment on a heavy-duty

Dual-screw adjustment on a heavy-duty spring-loaded three-finger jaw opens to 2

Seven-piece glass prism and lens set at 13mm thickness with all faces polished

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

Built to grip round flasks and condensers during distillation or reflux

and lumbar vertebrae for spinal anatomy instruction

1-10000Ω Plug-Type Brass Resistance Box, 17 Coils Capacity_5000mL Dual-screw adjustment on a heavy-dutyWidest range 17 coil plug type resistance box covering 1 ohm to 10k ohms with 21,110 ohms total at plus or minus 0. 1% on constantan windings, the precision standard for Kelvin bridge work.