Part Number: AN838-12 (Elbow,tube,90 degree)Part Number: AN838-12C (Elbow,tube,90 degree)Part Number: AN838-16 (Elbow,tube,90 degree)Part Number: AN838-16J (Elbow,tube,90 degree)Part Number: AN838-20J (Elbow,tube,90 degree)Part Number: AN838-4B (Elbow,tube,90 degree)Part Number: AN838-6S (Elbow,tube,90 degree)