Real Coal Specimen Set with Cotton Bag, 5-Piece Lab Supplies_Sieves the slim half-disc geometry letting

the slim half-disc geometry letting beams enter the curved face along its radius for clean refraction-angle and TIR observations

exposing extraocular muscles alongside internal ocular anatomy for ophthalmology teaching

Longitudinal head-throat-lung cross section reveals the full air pathway from nostrils through trachea to alveoli at half life size for respiratory teaching

Sloping Claisen head in borosilicate glass features two B14 sockets with 29/32 cone for thermometer and dropping funnel connections during distillation

transparent housing revealing the hydropower conversion inside the casing

Real Coal Specimen Set with Cotton Bag, 5-Piece Lab Supplies_Sieves the slim half-disc geometry lettingBundled in a cotton drawstring bag with a linked crystal growing activity, this pack of five small lumps of genuine American anthracite coal doubles as novelty and classroom specimen.