Stopper Rubber- One Hole bottom 31mm,top 36mm, length 35mm ( Pack of 10) Early Science 3-D Imaging Waveguide

3-D Imaging Waveguide

the child holding a teddy being comforted looks sad

sleigh with presents

With flap and gusseted pocket

kindergarten and younger children

Stopper Rubber- One Hole bottom 31mm,top 36mm, length 35mm ( Pack of 10) Early Science 3-D Imaging WaveguidePack of 20 stoppers made of superior quality, solid rubber. Orange color. The durable, rubber construction is suitable for use with chemicals. Resistant to acids, alkalis and ammonia. Easy to clean. Stable at temperatures between 20C 70C. Stoppers are designed for use in professional laboratories, but are perfect for a variety of applications in the home and garage.