transitional casings → traditional casings 411UL Casing 3/4″ x 2 3/4″ 409UL Casing 1″ x 3 1/2″ 407P Casing 11/16″ x 2 3/4″ 127UL Casing 5/8″ x 2 3/4″ 141UL* Casing 7/8″ x 3 1/2″ 142UL* Casing 1″ x 4 1/2″ 507P Casing11/16″ x 2 5/8″ 183UL* Casing 3/4″ x 3 1/4″ transitional casings →