Specifications:

Blue hollow single-axis box (applicable to 6cm spool)

Black and gray 2-axis box (applicable to 6cm spool)

Black and gray 4-axis box (applicable to 6cm spool)

Black and gray 6-axis box (applicable to 6cm spool)

Black and gray 8-Axis box (applicable to 6cm spool)

Buckle type 2-axis box (can be connected) [applicable to 6cm spool]]

Magnetic 2-axis box (can be connected) [applicable to 6cm spool]]

Magnetic 4-axis box (can be connected) [applicable to 6cm spool]]

Color:

Without foam shaft

With foam shaft