There are five standard facial/head sizes (Small, Medium, Large, Long/Narrow, and Short/Wide) corresponding to International Organization for Standards (ISO) technical specification IS0/TS 16976-2.
These headforms are static. The head has a soft Shore 00, (00-20), elastomer skin which has variable skin thicknesses. The heads contain a stainless-steel ISO 16900-5 breathing tube with two or three sampling ports.
The heads are mounted to an i-bodi 316 stainless-steel stand.