6-Piece Acrylic Lens Set, 38mm (Convex, Concave, Plano, Meniscus) Gifts_Kitchen Half-wood-half-metal 200 by 30mm cylinder

Half-wood-half-metal 200 by 30mm cylinder demonstrating thermal-conductivity differences through a wrapped paper that scorches over wood but stays uncharred over metal in flame

Used to spin the Newton disc into a perceived white via persistence of vision

this set covers the mid-range bench volumes with raised graduations and tapered pouring spouts

this decade box selects cascaded values for RC-time-constant

sized for fine-pitch breadboard work where 4mm hardware is too large for the apparatus

6-Piece Acrylic Lens Set, 38mm (Convex, Concave, Plano, Meniscus) Gifts_Kitchen Half-wood-half-metal 200 by 30mm cylinderCompact 38mm acrylic six piece lens set covering convex, concave, plano convex, converging and diverging meniscus, and plano concave geometries for safer student station optics.