DESC: Designed to withstand friction damage to internal components, the HSB320SATBK's high quality construction offers a 10,000+ insertion rating - allowing you to take advantage of the convenience it offers, without having to worry about worn down contacts or the component failure that could result. To help keep your drives running cooler, longer, the HSB320SATBK also provides a dual cooling fan system to help combat the heat generated from normal drive operation.