Nangong Letu Automotive Components Co., Ltd. Push-On Trim Seals offer a fast, easy way to weatherstrip and trim vehicle doors and windows. Install by simply pushing them over raw edges and flanges. Dual Durometer Sponge and Solid Rubber with Flexible Wire Core / Segmented Steel Core Material: EPDM Dense Rubber + EPDM Sponge Rubber + Steel Carrier Feature: Resistant to ozone, sunlight, water and weathering