Product details: Size: 3.5 x 0.6 inches (9 x 1.5 cm); Weight: 0.6 oz (18 g); Material: Stainless steel; Color: Silver, purple, blue, black, red; Product accessories: Main unit: Expansion kit: 2 large and 2 small spacers, 14 expansion kit rod diameter: 0.2 inches (4 mm).