Endo Steel

Endo Steel is a type of steel, which may be used in the "skeleton" of a Battle or OmniMech. Requires zero-G to manufacture. It is twice as strong, but also requires a greater diameter and is thus bulkier than normal BattleMech internal structure. While the weight savings in tonnage can be significant, Endo Steel requires a significant number of space within a BattleMech (7 slots for Clan 'Mechs, 14 for Inner Sphere 'Mechs). The weight savings for Endo Steel are greater than those saved by ferro-fibrous armor, but it is more costly and obviously more difficult to repair or add as an upgrade to a 'Mech.