Division 3.4.1.1
United Kingdom
The adult and child headform impactors shall be rigid spheres fitted with a synthetic skin and shall comply with Section 4 of this Chapter and with Figures 13 and 14 respectively of this Part. Diameters shall be 165 ± 1 mm for the adult headform and 130 ± 1 mm for the child headform respectively, as shown in Figures 13 and 14. The total impactor masses, including instrumentation, shall be 4,8 ± 0,1 kg for the adult headform and 2,5 ± 0,05 kg for the child headform impactor.