Firestone W21-760-2299 Ride-Rite Air Helper Spring<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Ride-Rite and Sport-Rite Air Helper Springs utilize a pair of convoluted or tapered-style air springs</li><li>These air springs are capable of 3000 - 5000 pounds of load carrying</li><li>Under no circumstances do we recommend exceeding the manufacturer's Gross Vehicle Weight Rating (GVWR)</li><li>Ride-Rite &amp; Sport-Rite</li><li>Air Helper Springs can be installed on most light trucks， RVs and vans， Ride-Rite and Sport-Rite Air Helper Springs are installed between the frame of the suspension providing load support through the use of air pressure</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31MnUJW4GHL.jpg" noproxy>