Electroless nickel plating plastic is either Grade 1 with phosphorous content of 3%-5%. Grade 2 electroless nickel plating plastic will contain 6-11% phosphorous content. Electroless nickel plating with low phosporous content exhibit low contact impedance. Electroless nickel plating with higher phospohorous content will have somewhat higher contact impedance but will have improved corrosion reistance.
Cybershield applies mid-phos electroless nickel with 5-8% phosphorous content.