Vetus WBB30. Windshield Single Blade Wiper. 12 inch. Stainless Steel . Coated Black. - Wiper blades with length of 305mm. The metal parts of the blades are made of stainless steel, either high-gloss polished or coated black. These blades will fit almost all makes and types of wiper arms with a tang of 7. 2 x 2. 5 mm.