This is a Hogue Pistol Grip known as the Rubber Grip, model 26010.
Hogue's Sig P226 Rubber Grip without finger grooves has a cobblestone texture which allows for maximum handgun control and tension flexibility. It is molded from a durable synthetic rubber that is not spongy or tacky but gives that soft recoil absorbing feel without affecting accuracy. The material used does not come apart or deteriorate and is resistant to all solvents and oils used around firearms. The flexibility of the materials they use along with the molding process allows then to produce superior grips with features that out perform all other makes. Fits Sig Sauer P226.
Features:
Fits Sig Sauer P226
Soft rubber without finger grooves
Cobblestone texture
Lasting precision fit and durability