The product is a set of 64 Lego bricks in a dark bluish gray color, specifically designed as Arch 1 x 4 pieces. These bricks are made of plastic and come packaged in a polybag. They are part of the LEGO brand and are perfect for building toys and hobbyists who enjoy creating with Lego pieces. With the gray color and arch design, these bricks offer a versatile and creative building experience for Lego enthusiasts.