10-Pack Porcelain Combustion Boats with Handle, 4 x 1 inch Subject_Zoology lens tucking inward when closed

lens tucking inward when closed to resist scratches during classroom

Wear-replacement timer switch for the goggle sanitizer cabinet

Wide-mouth dropping pipette in borosilicate glass dispenses viscous liquids and larger-particle suspensions in chemistry and biology procedures

the deeper body extending the visible refraction path for ray-box and Snell's law refraction studies

and amplitude

10-Pack Porcelain Combustion Boats with Handle, 4 x 1 inch Subject_Zoology lens tucking inward when closedPack of 10 porcelain combustion boats with handles support small samples during high temperature heating and chemistry analysis procedures.