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As shown in the description
blue and green and four different sizes
FlashBlue™ DNA Stain
Moving the cars by magnetic wand to follow the tracks into different direction
Toggle 2 x 2 Essential Kit As shown in the descriptionIncludes: Toggle 2 x 2 Essential Kit. Used in number of applications in laboratory, home, general purpose or games. Premium Quality: Kit is made of high quality, heavy duty and durable materials. Improved accuracy and robustness and are less expensive than traditional Toggle 2 x 2 buttons. 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,
