Material: This hinge is made of a robust metal material designed to provide performance and resist wear; Function: This door check bracket effectively keeps car doors open, preventing them from slamming shut when attempting to leave the vehicle; OEM Part Number: 9181H1, 9181N0 This is a reference part number. Please carefully check the part number of your item; Upgraded shaft design, smooth and quiet opening and closing: Adopting optimized structure, the door opening and closing is smoother, helping to reduce abnormal noise and shaking, and improving the overall driving experience. Please check the model, brand and year to confirm the compatibility. If you need assistance, please contact us through the Amazon messaging system., Manufacturer: PENGNAQP