... .The other accessories are handle, latch, castor (with lock or without lock), rubber feet, corners (brace or ball corners) , ... cases can be classified into two kinds: the U rack case and the case whose size should be ... , mixer case, audio case and so on.The U rack case’s length and width are invariable, but ... height is variable. 1U is about 44.5MM. The U rack case can be classified as: monolayer and double ...