High er-doping density. The product label on the package shows there is 999-meter fiber. We are uanble to use OTDR to test length of this fiber spool (internal fiber end is not accessible). We approximately measured the fiber roll thickess, then calculated the fiber length is close to 999 meter(very approximately). We also compared its weight with other CorActive model: EDF-L 900 spools, which matches the fiber length 999-meter(very approximately). So we believe the fiber length is full or almost full. Made in 2008 in Canada. Very high density er-doping. Actual test data of core absorption Er is 11.2dB/m at 1529nm in this spool. We will take fiber from this original spool. We have manual re-winding machine, we can use it to take fiber up to 100 meter or even 200 meter. For over 10 meter fiber, fiber length will be estimated by fiber spool turns and drum diameter rather than directly measuring length by ruler, so sold fiber length accuracy would be 0.2 meter.