IETLAB SRL Series Precision Resistance Standard (1 mΩ to 1.9 TΩ)

(Full specifications can be found on datasheet)

Very stable - up to 2 ppm/yr
Wide range of values - 1 mΩ to 1.9 TΩ,
Used by National Measurment Institutes across the world
3 Year Warranty Included
Excellent TC - as low as 0.4 ppm/°C - No need for stabilization in a temperature-controlled bath
Calibration report at 3 temperatures- Temperature chart with alpha and beta provided
Combination of multiple resistors in a single housing and direct plug-in unit for most DMM's Fluke , Wavetek, Agilent, is available

Datasheet