Jolly bulb metal - superior, Palm-sized, hollow metallic ball with a manometer connected to it for demonstrating change of pressure in a closed volume of air when heated or cooled, 80 mm diameter
Fun House Mirror is a high grade polyester sheet with a vacuum deposited silver metal surface. The mirror is 0.8 mm thick and 84 x 56 inches in surface area ; Comes rolled into 1.5in tube, and will unroll flat. Size flat is 135 x 210cm.
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