Tillett ERAIL Billet Aluminium Fixed Seat Rail Set - Suits EBR/REBB5 Side MountsThe beautifully machined billet aluminium ERAILS allows either the EBR, or REBB5 steel brackets to bolt down onto it and are used with seat models; B6, B6 43 XL, B7 40, B7 44, B8 43 and B9 43 (B5 with the REBB5). They take the place of the Lotus runner fixing the seat in a rigid position. Lotus seat adjustment runners are wider than the ERAIL so therefore cause the seat position to be higher. They fit in both sides of the car and can be used in left