Keep out dirt, bugs or anything else from entering your mining device.
The filter is designed to be attached to the back of the unit where the air comes in from. Screwing it in is needed.
Fits: Antminer S3, S5, S5+, S7, S9, T9, T9+, L3+, L3++, A3, E3, X3, B3, V9, D3 and any 6" 120mm fan sizes.
Bitcoin Merch Bin #2