SO6621-3 e arola lisebelisoa tsa selikalikoe tsa piston ka letoto la lihlooho tse tšeletseng: tšepe e bohlooho e entsoeng ka mocheso, tšepe ea tšepe e entsoeng ka mocheso, tšepe e entsoeng ka carbide, tšepe e ka tšeptjoang, tšepe ea ductile le tšepe. Ka 2012 Federal-Mogul e ile ea hlahisa letoto la bosupa la lisebelisoa tsa lesale la piston, GOE70. Thepa e sebelisa sebopeho sa matrix sa martensite le chromium carbide e kentsoeng, e hananang le ho kobeha.

Lisebelisoa le linomoro tsa serial tse sebelisoang haholo k'hamphaning ea rona:
Nomoro ea lintho tse bonahalang: H9 (GOE13)
Nomoro ea thepa: H6 (GOE32 F14)
Nomoro ea thepa: H11 (GOE52 KV1)
Nomoro ea thepa: H11A (PVD piston ring base material)
Nomoro ea thepa: H12 (GOE56 KV4)
Nomoro ea thepa: H17 (GOE65C SMX70 ASL813)
Nomoro ea thepa: H18 (GOE66 SMX90 ASL817)