SWF wiper blade (119840) clears the screen in a single pass using a rubber compound profiled for consistent contact pressure across the full sweep arc, eliminating streaking and chatter in heavy rain. The blade profile — Length [mm]: 400 mm, Length [inch]: Silicone Inch, Matching Adapter: U, Quantity: Steel — suits both flat (bracketless) and conventional spring-frame carrier types, with UV-stabilised rubber that resists cracking in summer heat and ice adhesion in winter. Compatible with OE wiper references: 3 397 008 530, 3397008530, 3 397 008 531, 3397008531 and 29 more. SWF wiper blades meet ECE Regulation 43 visibility standards and are pre-treated with a hydrophobic coating that beads water off the glass at motorway speeds. Wiper blades should be replaced every 6–12 months or as soon as performance deteriorates — rubber compounds degrade with UV exposure, temperature cycling, and contact with road salt or screen wash chemicals. Tell-tale signs of worn blades include streaking, smearing, juddering across the glass, unwiped patches, and a squealing noise during operation — any of these compromise visibility in wet conditions. Wiper blade replacement is one of the quickest DIY jobs on a car — most modern blades use a click-fit or pin-lock adapter that snaps onto the arm in seconds with no tools required. When choosing wiper blades, consider flat (beam) blades for even pressure distribution at higher speeds, and look for natural rubber or silicone compounds — silicone blades last longer and leave a water-repellent film on the glass. Replacing wipers before the autumn and winter months is a low-cost safety measure that dramatically improves visibility in the rain, sleet, and spray conditions that cause the majority of wet-weather accidents. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.