This is part of an Ultra-high vacuum system. An ultra-high vacuum system is basically a stainless steel chamber with very very very little air on the inside. If you envision outer space as devoid of air particles, my system contains about 10,000 times more air particles, but 100,000,000,000 less air particles than the environement around us on earth. It enables me to study how tiny molecules stick on surfaces. Fundamental science.