Quality made in Japan, this plastic ring mandrel for wax or silver clay ring making comes premarked with Japanese ring sizes. Excellent to form a ring on, as well as measure the size you need, it can be taken apart for easy storage.With this collapsible plastic ring mandrel & ring gauge in 3-30 Japanese sizes, you can conveniently mold PMC silver rings into their precise sizes.Simply shape the metal clay or wax ring, using our moulds or your fingers, and wrap around the desired size. Use paper or an oil lubricant to prevent the ring from sticking to the mandrel. Use a suitable PMC paste and/or water to mould to join the ends. Once your ring has been moulded, allow to dry and remove from the mandrel, remove any paper and fire in a kiln when ready.A great addition to your PMC tool kit. For sizes in other regions please see the table below: InchesMillimetersInchesMillimetersUnited States,CanadaUnited Kingdom,Ireland,Australia,New ZealandIndia,China,Japan,South AmericaItaly,Spain,Netherlands,Switzerland0.45811.631.4436.50   0.46611.841.4637.2¼   0.47412.041.4937.8½A  0.48212.241.5138.5¾A½  0.4912.451.5439.11B1 0.49812.651.5639.71¼B½  0.50612.851.5940.41½C 0.50.51413.061.61411¾C½ 10.52213.261.6441.72D21.750.5313.461.6742.32¼D½ 2.250.53813.671.6942.92½E330.54613.871.7243.62¾E½ 3.50.55414.071.7444.23F44.250.56214.271.7744.83¼F½54.750.5714.481.7945.53½G 5.50.57814.681.8246.13¾G½660.58614.881.8446.84H76.750.59415.091.8747.44¼H½ 7.50.60215.291.89484½I880.6115.491.92