Thank you for visiting the page! Ships with careful packing from Japan. Product Description This product is a set of two types �~4 sizes with a minus-engraved concave surface, which is ideal for the joint of a 20cm-class or higher mechanism. The numerical value of each runner represents the diameter size mm. Safety Warning N/A C KOTOBUKIYA 20cm This is a set of two �~4 sizes of negative concave surfaces, which is ideal for the joints of machines above the class.