PVC J trims are the most versatile molding. Use the J trim around doors, windows or any other obstructions. J trims can be doubled up and used to join two sections together (commercial applications). J trims are also used to start a section of slatwall. These PVC trims may only be installed with our original PVC Slatwall. They will not fit PROCORE Slatwall. NOTE: Proslat Slatwall Trims are NOT returnable.