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How to grow plants without water
Melde's Vibrating String Apparatus is great for demonstrating wave phenomena
attract and repel each other on a table
heavy duty and durable stainless steel
Designed for use in classrooms
Brass Pendulum Bob Balls Cotton How to grow plants withoutIncludes: 1 x Heavy Duty Brass Pendulum Bob Ball with Hooks. Rust Proof, made up of Brass which is long lasting. Used in number of applications in laboratory, home, general purpose or games. Premium Quality: Bob is made of high quality, heavy duty and durable Brass. Designed for use in professional laboratories but is an ideal choice for science classrooms and household use. If you need custom order with different sizes design, please contact us.
