This model swivel fitting 2007-2023 year sprinter passenger side . 1 1/4 inch high.
Installation:
1: Take off seat, 2007-2021 has 4 bolts.
2: put swivel on the base, swivel turn handle at back. use original bolts install swivel bottom on the base top.
3: need buy 4 bolts and nuts (metric 10x25 for 2007-2021). Bolts need buy round head bolts hexagonal.
Use those bolts install swivel up to original seat .
4: seat back to straight up， slide seat to medium then turn the seat.