ADF hinge replacement part compatible with models 3170, 3175, 3185, 3186, 3305, 3306, 4175, 4195, FN, FW, ND.Designed for use in automatic document feeder mechanisms.construction supports consistent in scanning and copying devices.Direct fit for specified models installation and function. Compatibility Disclaimer: This is not an OEM item.Mentioned brands/models are used strictly for fitment illustration.