SO6621-3 yana raba kayan zoben piston zuwa jeri shida: baƙin ƙarfe simintin toka, baƙin ƙarfe mai launin toka mai zafi, baƙin ƙarfe simintin carbide, baƙin ƙarfe mai yuwuwa, ƙarfe simintin ductile, da ƙarfe. A cikin 2012 Federal-Mogul ya haɓaka jerin na bakwai na kayan zoben piston, GOE70. Kayan yana amfani da tsarin matrix na martensite da chromium carbide da aka saka, wanda ke da juriya ga lankwasawa.

Abubuwan da aka saba amfani da su a cikin kamfaninmu:
Lambar abu: H9 (GOE13)
Lambar abu: H6 (GOE32 F14)
Lambar abu: H11 (GOE52 KV1)
Material lamba: H11A (PVD piston zobe tushe kayan)
Lambar abu: H12 (GOE56 KV4)
Lambar abu: H17 (GOE65C SMX70 ASL813)
Lambar abu: H18 (GOE66 SMX90 ASL817)