Pachmayr G10 Material, Fits Full Size 1911, Gray/Black 61001 G-10 material is a fiberglass based epoxy resin laminate. It is an extremely tough and durable material that is impervious to moisture" weather or chemicals" making it a perfect material for handgun grips. The multiple layered construction allows the use of different colors to be added to the semi-auto grips" creating attractive patterns as it is machined. Pachmayr G-10 Tactical Pistol Grips are available in two textures" a coarse Grappler pattern or Fine Checkered" and two color patterns" green/black and grey/black.