Description: 【Enhanced Wiping Power】: With its scientific power design, the wiper assist spring provides extra power to your windshield wipers, ensuring a stronger grip on the glass surface. This makes wiping more efficient and effective. 【Protective Cover Design】: The car wiper arm power has an extra protective cover to prevent scratches and damage to the wiper arm. It also enhances its cleaning effect, ensuring clearer in adverse weather conditions. 【Easy to Install】: It is easy to install the wiper assist spring. Simply lift the wiper arm, slide the assist spring into place, and secure it with the included fastening clip. 【Sturdy Construction】: The wiper assist spring is made of steel and rubber materials for long term durability. They can withstand harsh daily use and harsh weather conditions, providing long term reliability and performance. 【Universal】: This car wiper arm power assist spring is designed to fit most standard car windshield wipers. Specification: Material:Steel Rubber Size Chart: Approx.11cm/4.33inch Package Includes: 1 Car Wiper Arm Power Assist Spring(4 Pack) Note: Please allow slightly errors 1-2cm differences due to manual measurement.