・ This is a homemade ayu rod tip plug. Fits a base rod tip inner diameter of 22mm. ・ The inside of the plug is fully rubber-lined. ・ The center of the plug is made of soft sponge, which won't damage the rod tip. ・ The metal parts are made of 18-8 stainless steel and are rust-resistant. ・ The top surface of the plug has a finish close to a mirror and is beautiful.