A Volvo 850 Estate 1991 to 1997 model requires a 21" wiper blade on both the drivers side and the passengers side and all of the following wiper blades are designed to fit this vehicle. This model uses the Standard Hook arm attachment to fix the blade to the wiper arm, there is also the option of upgrading to the newer Retrofit style wiper blade. We also have the rear blade for this 850 Estate, simply click the Rear Blades tab below.