Learning Resources Primary Science Jumbo Test Tubes With Stand. These Oversized And Colourful Science Tools Are Ideal For Little Hands To Grip While Supporting Hands On Observation And Investigations. The Jumbo Test Tubes Feature Calibration Marks Of 25, 50, 75 And 100Ml To Encourage Experimenting With Volume. Made Of Sturdy Plastic, The Tubes Are Safe To Be Used With Liquids From 12 Degree To 93 Degreec. The Brightly Coloured Screw On Lids Are Wipe Clean To Enable Labelling For Different Activities. Set Comes Complete With Useful Plastic Stand For Storage, 14Cm W. Test Tubes Measure 15Cm H. Suitable For Ages 3+ 1 X Primary Science Jumbo Test Tubes With Stand.