I took measurements for you to help verify for you to check your equipment. These are nice brand new rubber. They feel great to the touch and are nice rubber. The bottom plate in the picture is from a actual Nad 2200. So I know these for sure 100% fit in a Nad 2200 Amp and similar Nad amps from that era.
Also will fit a Nad 1155 preamp, I own one and theyre the same push feet for the Nad 2200s. Easy to install, just place it in the hole and push the pin in and you will get a nice tight perfect fit. Outside of that will be additional at the buyers expense.The item "Nad Amplifier 2200 & 1155 Preamp Push Isolation Feet For Receivers & Amp 4 Feet" is in sale since Wednesday, October 21, 2020. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps".
The seller is "monkeylove_11" and is located in Titusville, Florida. This item can be shipped to United States.