Other, less common grades and designations of aluminum/glass fiber hybrids also exist. A newer class of GLARE, called High Static Strength GLARE (HSS GLARE), incorporates the 7475-T761 alloy and cures at using FM906 epoxy pre-preg. HSS GLARE comes in three grades (HSS GLARE3, HSS GLARE4A, and HSS GLARE4B), mirroring the plies and orientations of their corresponding standard GLARE grades. Russia, which at one point was going to incorporate GLARE into its Irkut MS-21 narrowbody airliner, refers to its version of GLARE as SIAL. The name is a translation from the Russian acronym for fiberglass and aluminum/plastic (С.И.А.Л.). It defines the grades SIAL-1 through SIAL-4, which usually contain the second-generation Russian aluminum-lithium alloy 1441 and range in density from . SIAL is used in the wing covering of the Beriev Be-103 amphibious seaplane. Airbus bases their material designations on the underlying aluminum alloy, using prefixes such as 2024-FML, 7475-FML, and 1441-FML instead of GLARE and HSS GLARE.