Mapangidwe anayi a lobed amapereka kawiri malo osindikizira a O-RING wamba.
Chifukwa cha kusindikiza kawiri, kufinya pang'ono kumafunika kuti mukhale ndi chisindikizo chogwira mtima.
Zabwino kwambiri zosindikiza bwino.Chifukwa cha kukhathamiritsa kwabwino pagawo la X-Ring, kusindikiza kwakukulu kumatheka.