They are 4 pins PWM splitter cable with 5cm wire length.
One end is a female connector and splits to 2 male connectors at two other ends.
The splitter connects tow fans to a single connector of motherboard, compatible with 4 pin PMW fan connector.
Fan Splitter Cable is made of plastic and metal, more durable and make the inside of PC case looks more clean & tidy.
Package includes : 4 pack computer fan splitter cables in total, please ensure your motherboard fan header is capable of the additional electrical load before purchasing.