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Mgo bottoms for cartridge heatersWe have the size:Nosize(outer diameter+inter diameter)15.8 * 4.426.0 * 4.437..0 * 5.247.8 * 5.458.7 * 6.467.7 * 6.378.8 * 7.089.0 * 7.299.9 * 7.41010.0 * 8.21110.6 * 7.81211.5 * 9.01312 * 9.21412.1 * 9.21514.0 * 10.81614.5 * 12.31712.7 * 10.11813.7 * 11.21915.0 * 12.12015.6 * 12.72116.0 * 11.82216.5 * 13.62317.9 * 13.62417.5 * 14.62518.0 * 14.32618.4 * 15.62719.0 * 15.02820.1 * 16.2
link:http://www.superbheater.com/materials-and-fitting/cartridge-heater-materials-and-fitting-parts/high-quality-tateho-totc-quality-cartridge.html
High Quality Tateho TOTC Quality Cartridge Heaters Magnesium Bottoms