This is a Norton pickup equipped with Air Backer technology. Air Norton's patented magnet structure reduces the impact of string vibrations that disrupt sustain, dramatically improving expressiveness in terms of attack and dynamics. When combined with an Air Zone, Tone Zone, or Steve's Special as the bridge pickup, it blends in nicely with their powerful sound. You can also use it as a neck pickup in combination with the Air Classic bridge model for a medium-power blues rock sound. Specifications Output 270 Treble 5.0 Middle 7.0 Base 6.5 DC resistance 12.58k Magnet Alnico 5 Conductor 4 Air Backer Technology Standard-Spaced & F-Spaced DiMarzio full-size humbuckers come in two sizes to accommodate different guitar specifications. Generally, Gibson guitars use a standard pole piece spacing of 9.7mm, while guitars equipped with synchronized tremolo or Floyd Rose guitars use a 10.2mm F-space. The above may not apply depending on the specifications of your guitar and the position you want to install it in. We recommend that you measure the string spacing in the position you actually want to install it in before placing your order. ■The tone guide shown is the manufacturer's reference value. ■The image is a sample. The color of the actual product may differ slightly. ■Specifications may be changed without notice due to improvement efforts.