Throw these Premium rattlesnake eggs in the air, and they are drawn together magnetically, making a sound like a rattlesnake.A great stress reliever. Case of: 25. Manufacturer: Premium. Retail Packaged: Carded. UPC Coded: Yes. Materials: Hematite. Dimensions: 1.5 inches L x 0.5 inches D (each egg). How packaged: 25 sets of 2 eggs per case. Features:Irresistibly fun. Endlessly fascinating. Great for relieving stress. Fun conversation piece.