HGS Molecular Structure Model B Set for Organic Chemistry, with a detailed parts list. Uses: 〇 Ideal for children's science education. For science education in elementary and junior high schools. 〇 For high school students' entrance exam preparation. 〇 For university students' research, this is a model that allows for the assembly of本格的な (authentic/full-fledged) molecular models. - Brand: MARUZEN - Model Name: HGS Molecular Structure Model B Set - Application: For organic chemistry - Set Contents: Molecular model parts list - Instruction Manual: Set configuration and usage - History: After purchase, the instruction manual and box have some sun damage due to long-term storage, but the molecular models themselves are made of resin and are in good condition. The white rods indicating bonds have some slight sun discoloration. Thank you for viewing.