Thank you. 300×2-30=570 Thank you. These are surgical stainless steel lobster clasps. They come with 4mm jump rings for easy connection. Stainless steel is very resistant to rust and discoloration. Surgical stainless steel is a general term for stainless steel (such as 304 and 316) used in medical instruments, and it is said to be less likely to cause allergies. ● Material: Surgical stainless steel SUS304 ● Size ・Lobster clasp: 9mm x 6mm ・Jump ring: 4mm (0.6mm width / 2.8mm inner diameter) ● Quantity: 10 pieces each ● Colors ・Silver (no plating) ・Gold (18KGP ion plating) (The color in the first image will be provided) What is ion plating? It is more expensive than conventional wet plating, but it has excellent adhesion and wear resistance. The color lasts longer. ● Notes ・Although it is a skin-friendly material, it does not guarantee that allergic reactions will not occur in everyone. ・The ease of opening and closing the lobster clasps may vary depending on the arrival time. Items are considered good quality unless the spring remains open and does not close. Please understand this in advance. ● Surgical stainless steel list #surgipony ● Metal allergy-friendly product list #metalallergypony ● Product list #ponyparts ● Shipping ・Regular mail (free shipping) → No delivery on weekends and holidays. → It often takes 2-5 days to arrive after shipping. → It takes time to arrive. ・Mercari mail (+200 yen) → Delivery on weekends and holidays. → Tracking and compensation available. Recommended for those in a hurry. ● Bundle discount We offer a discount only to those who purchase multiple of the same product or other products together. Please let us know the desired products in the comments section before purchasing. From the total amount ・2 items: 30 yen off ・3 items: 60 yen off ・4 items: 100 yen off ・50 yen off for each item thereafter ! Note! Price changes cannot be made after purchase due to the system. If you wish to receive a discount, please comment with the product number and quantity of the desired product before purchasing. If you purchase other products after your purchase, we will provide a product service for the corresponding amount if we can combine the items. We will select the service product. You cannot choose. Please understand this in advance.