Official Gunpla modeling parts that have a high level of detail. This set has 4 types (cone type a x 4, cone type b x 4, flap x 4, and ring x 4) of verniers with a total of 16 verniers. These are made for 1/100 kits. Each vernier has a mounting ball joint and works with the Builders Parts HD 1/100 MS Effect 01 set. Package contains 4 runners and instructions.