BOSCH 3397118991 / AR991S Set of AEROTWIN RETROFIT Windscreen Flat Wiper BladesAerotwin flat wiperblades are available for all conventional commercial vehicles, vans, buses and special vehicles. They are particularly appealing due to their innovative styling and are the perfect solution for large window surfaces for which the extra-long wiper blades are used. The Aerotwin wipers can be easily mounted with the help of the pre-assembled universal adapter.Tried-and-tested Twin dual material wiper rubber: soft rubber back for low-noise wiping and double wiper-blade edges with double micro edge for perfect cleaningAerodynamically optimized profileHigh-tech spring strip, which adapts exactly to the curvature of the windshieldBlade LENGTH:650mm / 26" & 575mm / 23"BLADE TYPE:Flat WiperIf you are unsure as to whether this is the correct part for your vehicle, please don’t hesitate to contact us. Alternatively please use the cross reference table above.