Designed to perform in the toughest environments and help protect you while out on the road. Durable metal construction with connections specifically designed for heavy-duty wiper arms found on trucks, buses and RVs. Designed for two arm styles Wide Saddle, which is found on buses and older Class A RVs and 12 x 4 Hook, which is found on newer Class A RVs. Engineered to properly distribute load across longer wiper lengths for better wiping performance. Natural rubber wiping elements gives you the cleanest view. Sold individually - Replace every 6 months. Not sure of your application? View application guides below to get the correct wiper blades. | Trico 67 Series RV Wiper Blade 28" WS