sunfounder diy 4-dof robot learning kit with arduino nano toy gift for children
4 x 8 round head phillips screw ), 4 x m1.package contents package contents: 4 x 9g tower pro servo, 1 x ultrasonic module, 4 x ( m3 x 30 ) bi-pass aluminum standoff, 4 x ( m3x 6 + 6 single-pass aluminum standoff, 12 x ( m3 x 8 ) round head phillips screw, 12 x ( m3 x 6 round head phillips screw ), 16 x m3 nut, 12 x ( m2 x 8 round head phillips screw ), 12 x m2 nut, 8 x ( m1.2 x 4 self-tapping screw ), 4 x ( m1.