ʻO nā'ōpū o nā'ōpala he mau'āpana i hanaʻia i nā'ōpala, a me nā meaʻala i hiki ke hoʻokaʻawaleʻia nā meaʻala i loko o nā'ōpala kūlohelohe ʻO ka maikaʻi o ka'ōpala kūlohelohe he palupalu loa ia, elasticity faile ʻO nā kāmaʻa hāmeʻa Indoror e hoʻohana nui ai i ka'ōpala kūlohelohe.
Kauoha:
EPDM: S537-3; S537-2; J-2070; J-2080; TR 608;