Description If you are in search of some test tube stoppers, then you must not miss our rubber plugs. Simple in structure, easy to use, suitable for professional and personal use. Small size and light weight, these rubber plugs for testing tubes are easy to take, has good sealing effect for you to use with peace of mind. Features -Color:White -Material:Rubber -Size:5.00X5.00X3.20cm/1.97X1.97X1.26in -Size:4.50X4.50X3.00cm/1.77X1.77X1.18in -Size:4.20X4.20X3.00cm/1.65X1.65X1.18in -Size:3.70X3.70X3.00cm/1.45X1.45X1.18in -Size:3.30X3.30X2.80cm/1.30X1.30X1.10in -Size:2.90X2.90X2.80cm/1.14X1.14X1.10in -Size:2.80X2.60X2.60cm/1.10X1.02X1.02in -Size:2.60X2.30X2.30cm/1.02X0.90X0.90in -Size:2.60X2.00X2.00cm/1.02X0.79X0.79in -Size:2.50X1.90X1.90cm/0.98X0.75X0.75in -These rubber sealing stoppers are good for use in the chemical industry, medicine, and other scientific research, meeting your demands. -The rubber tube plugs are a necessary sealing rubber stopper for experiments and can be used with test tubes. -Featured taper shape design of these rubber stoppers makes these tube stoppers easy to insert and pull, save your time and efforts. -These sealing stoppers for test tubes are small and compact, making them easy to store and use without taking up much space in your home or laboratory. -Smooth surface design of these sealing stoppers let them will not damage bottles or test tubes in the laboratory. Packing list2 x Testing Tubes Stoppers(000#, 17mm height)2 x Testing Tubes Stoppers(00#, 21mm height)2 x Testing Tubes Stoppers(0#, 24mm height)2 x Testing Tubes Stoppers(1#, 25mm height)2 x Testing Tubes Stoppers(2#, 26mm height)2 x Testing Tubes Stoppers(3#, 26mm height)2 x Testing Tubes Stoppers(4#, 28mm height)2 x Testing Tubes Stoppers(5#, 28mm height)2 x Testing Tubes Stoppers(6#, 28mm height)1 x Testing Tubes Stopper(7#, 30mm height)1 x Testing Tubes Stopper(8#, 30mm height)1 x Testing Tubes Stopper(9#, 30mm height)1 x Testing Tubes Stopper(10#, 32mm height)