The WP21 Series has a low-profile compact design with a narrow pitch design. It has a 0.35 mm pitch with two rows, a stacking height of 0.6 mm, and a width of 1.95 mm. With a 2-point contact design, it resists twisting stress and enhances retention strength. It also improves workability for customers by providing a click feeling when mated. The WP21 Series contact structure ensures high wear-resistance and high contact reliability, it is also lead free with a nickel barrier finish on the contacts in order to prevent solder migration.