Holco H4 series precision resistors ( style : k = 0.25W) 0.1 - 1.0% tollerance legendary long term stability, as used in avaition equipment and quality Hi-Fi gear. temperature coefficients: Z=100ppm C=50ppm D=25ppm Y=15ppm Status: NOS ( New Old Stock) RoHS compliant : no. price is per resistor.