This is a Remington known as the Supercell, model 19471.
The Remington Supercell Recoil Pad is the world's most efficient inhibitor of kickback energy" providing an amazing 54% reduction in felt recoil over the standard factory pad. Using a complex matrix of millions of Supercells" the advanced polymer construction harnesses and releases energy over a much longer time period. Rearward force of your gun is reduced from a kick to a gentle push and muzzle travel is diminished" resulting in the softest shooting experience possible. All from a pad that's extremely lightweight" durable and enhanced with a smooth surface (not sticky) for rapid gun mounting. Fits Models 870" 1100" and 11-87 (2004 or newer) including Super Magnum models that came with the RS or Supercell Pad as original factory equipment.
Features:
Remington Supercell Recoil Pad for Wooden Shotgun Stocks
Fits 12-gauge wooden stock models 870 1187 1100 SP-10