Manufacturer Part Number (MPN) : MXSPBFThe Max Spark Buckle Fold Back is packed with features at an affordable price. It has the Max padded wrist starp for comfort. A fold back head to keep it out of the way when not in use. Another new feture for this release is the locking length adjustment while mainting a 360 degree rotating head. The Spark strap is smaller to fit better for women and childern.