Made of surgical stainless steel. Includes 4mm round rings for convenient connection. Stainless steel is very resistant to rust and discoloration. Surgical stainless steel is a general term for stainless steel (304, 316, etc.) used in medical instruments and is said to be less likely to cause allergies. ● Material: Surgical stainless steel SUS304 ● Size ・ Lobster clasp: 9mm x 6mm ・ Round ring: 4mm (width 0.6mm / inner diameter 2.8mm) ● 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 may vary depending on the arrival time. Items are considered to be of good quality unless the spring does not close after opening. 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. → Delivery usually takes 2-5 days from dispatch. → 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 Discount available only for those who purchase multiple of the same product or other products together. Please let us know the desired products in the comment 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 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. #metalallergypony #ponyparts #surgipony #metalallergypony