TRICO HD wiper blades offer the largest selection of heavy duty wiper products for virtually all of your heavy duty vehicle needs. The heavy duty wiper blades are available in a variety of styles for trucks, RVs and buses and come in lengths from 10" to 40". Trico 61 Series Wiper Blades are designed for flat windshields, which are usually found on heavy duty trucks, school buses, step vans and recreational vehicles. An adapter package is included with each blade in order to install a flat shield blade onto a competitor's heavy duty wiper arm.