Do you need portable and useful test tube solid plugs? If so, take a quick look at this item. Made of rubber materials, practical and excellent. Simple look design and craftsmanship its popularity and practicality, excellent durability. Features -Color:Black -Material:Rubber -Size:4.10X4.10X2.50cm/1.61X1.61X0.98in -Size:3.70X3.70X2.50cm/1.45X1.45X0.98in -Size:3.20X3.20X2.50cm/1.26X1.26X0.98in -Size:2.70X2.70X2.50cm/1.06X1.06X0.98in -Size:2.60X2.60X2.50cm/1.02X1.02X0.98in -Size:2.50X2.40X2.40cm/0.98X0.94X0.94in -Size:2.50X2.00X2.00cm/0.98X0.79X0.79in -Size:2.50X1.90X1.90cm/0.98X0.75X0.75in -Size:2.50X1.70X1.70cm/0.98X0.67X0.67in -Size:2.50X1.50X1.50cm/0.98X0.59X0.59in -Note:comes with 11 different sizes. -Wide range of application, test tube solid plugs are suitable for various uses such as laboratory test tubes, experiment test tubes. -Test tube plugs are crafted from rubber, ensuring durability, sturdy and useful, safe and excellent. -Multiple sizes available, test tube plugs are simple to use, cater to different requirements. -Excellent sealing performance, effectively prevents leakage of liquids, test tube rubber plugs are practical. -Reasonable design, simple structure, test tube stopper is easy to use, allowing for effortless installation and removal. Package list: 5 x 000# Stoppers 2 x 00# Stoppers 2 x 0# Stoppers 2 x 1# Stoppers 2 # Stoppers 2 x 3# Stoppers 2 x 4# Stoppers 1 x 5# Stoppers 1 x 6# Stoppers 1 x 7# Stoppers 1 # Stoppers