1.Compatibility – These ear pads are a universal ear pad for full size headphones. They are confirmed to fit on AHD2000 AHD5000 AHD7000 AHD5200 AHD7200 and AHD9200 Headphones. The skirting attachment system on the back of these ear pads will make them compatible with other headphone models as well. The above list is just the models that have been tested. 2.Revive your headphones – If you have spent the money on a set of AHDa2000 AHD5000 AHD7000 AHD5200 AHD7200 or AHD9200 headphones then you are used to jamming at another level. These upgraded ear pads were designed to give you the possible comfort and great sound giving you the audio experience you deserve. 3.Design and Quality - Sheepskin leather is used on top and inside of the ear pads (the areas touching your skin). Protein PU is used on the sides (increasing the seal and weld strength). Sheepskin is a naturally porous material that leaks sound that cannot be heat welded. Using protein PU on the sides solves these problems and gives the desired sound. Outer Dimensions: Diameter: 4' (10 cm), Ear cavity: 2.25' (6 cm) x 1.5' (4 cm), Thick angled side: 1' (2.5 cm), Thin Angled Side: 0.8' (2 cm). 4.Quick and – Detailed instructions and video guide are included on product inserts to make the installation process easy. Check out the video guide for Denon AH-D5200/7200/9200 on YouTube, search for 'AHG Denon AHD5200/7200/9200 ear pad installation'. The video for AHD2000 AHD5000 and AHD7000 can be found by searching for – 'AHG Omni/Orion ear pad installation - Fostex/Denon etc'