Invar System Kits:

• The 590803 and 590804 Invar Kits are designed as multipurpose kits
• Often used as scale extension.
• Inar has a very low coefficiernt of thermal expansion which effectively eliminates changes in length due to handling or environmental changes.
• The 590803 is manufactured to its stated length within ± 0.0003”.
• The 590804 is manufactured to its stated length within ± 0.0001”.