This shock absorber from Monroe, model number SET-TS5681, is designed for use in BMW 135i, 325i, and 328d models. It is suitable for the rear left or right placement on the vehicle and has a screw-on mounting style. The shock absorber type is gas and it has a single pipe system with a travel length of 6.01 inches. Included in the package are the shock absorber itself, as well as the necessary mounting hardware. The material is made of alloy steel and it is not a vintage part. It is also non-adjustable and not a universal fitment. This high-quality shock absorber is a genuine OE/OEM part number, with numbers 31306757043 and 31306757044.