Per 
Photograph of 4512 instance.
Item #: SCP-4512
Object Class: Keter
Special Containment Procedures:
SCP-4512 is to be kept in 4 m x 4 m x 4 m airtight cell. Daily checks for any cracks or holes are mandatory. Any fly that escapes is to be exterminated by a standard █████-toxin agent of any kind. Any tests are to be approved by Dr.█████. Every 5 days the same standard █████-toxin agent is to be administered into the cell, to keep down the 4512-1 population.
Description:
SCP-4512, is an extremely large nest of flies, which produce a constant screaming, the screams include a male between the age of 15 and 30. Re-containment is possible but hard, due to the sheer number of how many flies there are and how small they are, but they can be given away by their constant screaming. They are generally not aggressive and hostile.
The flies (Which now will be referred as 4512-1) when provoked will all begin to slowly come out of the nest and begin to swarm the subject (Which will also be referred as 4512-2). All 4512-1 instances, after swarming for 2 minutes two 4512 instances, will enter the victims ear, and begin eating the victims Tympanic Membrane (Eardrum). After finishing the instances will enter the victims brain, and begin eating at it, until there is nothing left.
After finishing eating on the victims brain and is deceased the flies have no choice but to exit out of the eyes. They will eat at it until the eyeballs are cleared enough for them to leave. The swarming flies, still circling around the victims body, will begin to sting and inject larvae into the victims body. Any personnel are to wait until the victims body has fully decomposed and the instances are not to be aggressive.