Silver Plating over Solid Brass. You will receive the following sizes and quantities: Beadalon size #1, .08 inner diameter - 250 Crimps, Beadalon size #2, 1.3mm inner diameter - 150 Crimps, Beadalon size #3, 1.5mm inner diameter – 125 Crimps, Beadalon size #4, 1.8mm inner diameter – 75 Crimps. These beads will fit beading wire from .010 inch up to .026 inch. Each bottle is marked with the size number