1 Small volume， it is conveniently installed for travel or shopping2 It can be installed on the guide pillar of the seat back headrest that takes small space.3 Fits for various kinds of cars. Material: blackMaterial: ABSProduct size: about 13.8 x 8.5 x 2.8 cmPacking size: about 22.5 x 13.6 x 3.3 cmHole diameter: about 15.4 mmHow to install: press the rising/falling button on the headrest， take out the headrest and take the hanger into the headrest rod. Insert back the headrest and complete installation. 1 x Car hangerIn blister package