An interior rearview assembly comprising a rearview element, a rearview housing supporting the rearview element and a mount connected to the rearview housing and configured to support the rearview housing. The scraper includes a frame adapted for attachment to a vehicle and an articulated blade. 5, a MgTi molar ratio of less than 8, an amount of titanium, with respect to the total weight of said solid catalyst component, higher than 4% by weight characterized by a specific SS-NMR pattern are particularly useful for preparing narrow MWD crystalline ethylene polymers.