Plastic20 gms Product Dimensions:12 x 2.5 x 1 cm Packaging Dimensions:15 x 15 x 15 cm Package Content: 4 Pc 1. Necessary Use: This car seat headrest hook is great for keeping your car organized. Easy and comfortable to use. 2. Functional - Helps turn your car headrest into a convenient storage space for hanging groceries, umbrellas, bags, water bottles, baby supplies, and more.3. Fits: This item fits most cars. It can be detachable and fits the car headrest with a diameter between 8-14mm.4. Maximum load capacity: can support up to 1.5kg, the hooks will organize your back seat.5. Easy to install: just hang on the headrest, lightweight and portable.