EPDM, NBR, SBR, NR, Silicone(VMQ), Neoprene(CR), HNBR, XNBR, FKM, FFKM, FVMQ, FLAS, PTFE, PU, ECO, IIR, ACR, etc...
Inā loaʻa kekahi koi kūikawā i ka hana waiwai, e like me ke kūpaʻa wela, kūʻē i ka deformation, hoʻonohonoho hoʻoemi,