The simple structure of these silicone stoppers makes them easy to use for various applications. Small size and lightweight design make these stoppers convenient to transport and store. Features - Color: Black - Material: Silicone - Size: 1.67 x 1.67 x 1.25 cm / 0.66 x 0.66 x 0.49 in - Size: 0.75 x 0.55 x 0.55 cm / 0.29 x 0.22 x 0.22 in - Size: 1.55 x 1.55 x 1.23 cm / 0.61 x 0.61 x 0.48 in - Size: 1.64 x 1.64 x 1.27 cm / 0.64 x 0.64 x 0.50 in - Size: 2.00 x 2.00 x 1.40 cm / 0.79 x 0.79 x 0.55 in - Size: 1.60 x 1.60 x 1.28 cm / 0.63 x 0.63 x 0.50 in - Plug diameter: 2.7 mm, 8 mm, 9 mm, 12 mm, 12.5 mm, 13.5 mm - Offers durability and resistance to breakage, with excellent texture - Suitable for salt bottles, tubes, flasks, test tubes, and other laboratory uses - Silicone plugs feature a simple design for easy insertion and removal, providing convenience and ease of use - Designed to fit tightly, effectively helping prevent liquid or gas leakage - Compact and lightweight, ideal for storage and transport, suitable for both home and laboratory settings Package list: 2 x silicone plugs 2.7 mm 2 x silicone plugs 8 mm 2 x silicone plugs 9 mm 2 x silicone plugs 12 mm 2 x silicone plugs 12.5 mm 2 x silicone plugs 13.5 mm