Installation Instructions do NOT come with this part! Please know that your user manual contains instructions on how to change this filter! This original Panasonic Microwave Charcoal Filter originally shipped with the following Panasonic devices: NNSD277WR, NN-SD277WR This is a true Panasonic part! This item is NEW! Don't see your model number? Send us a message as we are happy to help!OEM Panasonic Microwave Charcoal Filter Originally Shipped With NNSD277WR, NN-SD277WR