SIZE: Chunky acrylic specimens measure 2.8-3 inches in length and are 1/2" thick. INVESTIGATE: Kids can have an up-close view of real specimens encased in high-quality clear acrylic Manufacturered by Excellerations. LIGHT TABLE: Ideal for use on light tables and with natural light EDUCATIONAL VALUE: Exclusive science specimen sets target a variety of interests. Supports STEM and Early STEM studies of life science SET INCLUDES: Butterfly eggs caterpillar cocoon. 4 Pieces.