ML2 adapter for attachment of 20 - 40 cm (7.87“ - 15.75“) truss - Vertical. Suitable for M290 - M390 series truss. Painted black-blue for use in black background scenes. Can only be used with A55-35 adapter.. Suitable for M290 - M390 series truss. Painted black-blue for use in black background scenes. Can only be used with A55-35 adapter.