This is a Limbsaver Recoil Pad known as the Grind-To-Fit, model 10538.
LimbSaver's Nitro Grind-to-fit Recoil Pad is designed with added cushion to protect your shoulder from the intense kick from safari-grade calibers. This pad is also great for shooters who are especially sensitive to felt recoil and need the added protection. The Nitro Grind-to-Fit Recoil Pad is 1 1/2" inches thick. The Nitro Grind-to-Fit Recoil Pad will protect you from the fiercest" most violent rifle kickback. This top-of-the-line pad reduces up to 80% of felt recoil. With your shoulder protected" you can shoot confidently without flinching for hesitation" for a more accurate shot. Like all Grind-to-Fit Recoil Pads" this model can be altered to perfectly fit your gun stock.
Features:
Size Medium- 1 1/2 LOP 5 3/32 x 1 13/16
Grindable to 4 1/4 x 1 5/16 for a customized fit on gun stocks
Extra thick 1.5 pad