This version seatrail strictly recommended for Bucket ( Shell ) seat uses. Can fix to the lowest seating position. Width of Bucket Seat must not exceed 395 & 415mm. ( Seat Bottom Part ) Not recommeded for XL seat. Complete with 4pcs Side Stay and Seat Belt Holder, screws and nuts. Can be fitted on most standard bucket seats such as Recaro SPG, RSG, SPA and etc Sparco Rev, Evo, Pro 2000, S-Light, Pro-Adv TS, Pro-ADV, Circuit LF , Drifting and etc Omp WRC-R, ARS-R, Champ-R and etc Bride Zeta 3 and most Bride seat Easy to Install No Modification. Side Level Double-Locking Mechanism. Made of 4mm steel metal ( safety-reason ) Made by ISO 9001 certified manufacturer. HOME BRAND Application List on request. ( [email protected] )