Come with 4pcs round metal plates and 4pcs rectangle metal plates, you can stick onto the back of your phone/phone case for easy installation. Suitable for all magnetic car mount holder for dashboard, vents, CD slot or windows. It\'s only 4mm in thickness, adding no perceptible bulk for your phone or case. Universal Usage: Compatible with all magnetic car mount holder and stick it on your phone or phone case for easy installation. Strong Adhesive: Equipped with strong adhesive tape on the back, easy to stick onto the back of phone or case without a hassle. Powerful Metal Plate: Made of anti-rust iron with electroplating processing, the metal plates allow you to place your phone horizontally or vertically, not easy to fall off even going over bumpy roads. Ultra-Thin: It\'s only 4mm in thickness, adding no perceptible bulk for your phone or case. Package Content: Including 4pcs 1.57x1.57 round metal plates and 4pcs 2.56x1.77in rectangle metal plates to meet your different needs. Brand: Fresh Fab Finds Product Type: Metal Plates Color: Black Material: Anti-Rust Iron Process: Electroplating Shape: Round, Rectangle Per Round Metal Plate Size & Weight: 4x4x0.04cm/1.57x1.57x0.016in; 4g/0.009lbs Per Rectangle Metal Plate Size & Weight: 6.5x4.5x0.04cm/2.56x1.77x0.016in; 9.5g/0.02lbs Package Size: 11x10x1cm/4.33x3.94x0.39in Package Weight: 59g/0.13 lbs 4 x Round Metal Plates 4 x Rectangle Metal Plates