Class 7 Economical Stainless Steel Cylindrical Weight, For rough weighing operations in physical and chemical laboratories, such as force measuring apparatus. 2000g
Convection Of Gas Apparatus, Small, Ventilation Apparatus, Smaller Sized To Fit In Any Classroom Than Standard Convection Of Gas Apparatus, Comprised Of A Metal Box 4inX6inX4in With A Sliding Front Door, Two Glass Chimneys And A Candle Holder.