Plastic Components "Z" Flashing for joints such as floor line or gable, etc. applications. For use at floor line with plywood or other sheathing products. "Z" Flashing is non-rusting and has pre-drilled nail holes. Z Flashing for Floor Line Applications shall be Plastic Components Inc. #_________. All exterior accessories shall be of PVC material conforming to ASTM standards D1784, C1063, and D4216-99. They shall be used where specified by the architect and installed per industry standards.