Rectangular Refraction Acrylic Block, 100 x 75 x 18mm Subcategory_Microscope Slides this 80mm steel needle in

this 80mm steel needle in a 6mm rod doubles as a precise alignment reference for image-formation and ray-tracing setups

and biliary anatomy for digestive and pathology teaching

this fan-shaped nylon brush rides a twisted stainless steel handle flexible enough to bend around difficult interior angles

bridging the reach gap between the standard 500mm and the long-haul 1000mm plug-to-plug patch wires

5-meter bench on leveling-screw feet

Rectangular Refraction Acrylic Block, 100 x 75 x 18mm Subcategory_Microscope Slides this 80mm steel needle inPairs 100 by 75mm with 18mm thickness on an acrylic rectangular refraction block, the wider working face giving longer beam paths for clear refraction angle measurements.