The Loving Cool Series PC Case Fan is a set of 4 fans with a diameter of 120mm, featuring high brightness LED beads for a bright color display. The fans are black in color and use hydraulic bearings for smooth operation. With a maximum fan speed of 1800 RPM and voltage of 12V, these fans are designed for optimal cooling performance. The fan pack comes in a blister pack packaging and is compatible with universal brands, making it a versatile and efficient choice for computer cooling systems.