Deck extension for the 50-70 ton range of Liddell/Birmingham and Fontaine Specialized lowboys. This extension is for the "raised beam" style trailers. The pin to pin dimension is 52" (the actual extension gained). Message me for any precise measurements that you need. TEXT ONLY nine three one 7282894. We do not answer calls from other area codes, thanks to scammers..!! We will load for you.