BlackBerry Leather Holster for 8300, 8310, 8320, and 8330 Curve  (Black) Built-in grooves constructed of hard plastic run along the front and back insides of the case to protect the trackball Multi-rotational RIM Swivel Clip Magnetized proximity-sensing technology Durable leather exterior Compatible with Blackberry CURVE 8300, 8310 & 8320 Devices