Products BaseRectangular Base Back Base Rail Fitting Rectangular 90° 556-21580-00 Item Number: 556-21580-00 Base Rail Fitting Rectangular 90°, 2 Hole, 7/8" You May Also Be Interested In Seat Base Swivel 256-06517-00 Base Rail Fitting Rectangular 90° 556-21580-00 Hinge with Thread 956-08624-00 D Shackles 956-00805-00