This retractable directional pour spout is a Rieke FlexSpout II. It has a LDPE plastic body, a metal retainer, and an HDPE plastic cap. The FlexSpout II offers a reliable seal and an indication of tampering (tamper evidency). It affixes to a 2-3/8 inch (63mm) opening without registry, and is designed to complete drain the container. Can be used with both plastic and metal containers.