Designed to support Network Interface Devices (NID), station protectors and optical networking terminals (ONT) at non-permanent locations, including mobile homes, construction trailers, parks and entertainment venues. Adjustable height mounting plate is 3.7"W x 19"H; three mounting plate heights provide overall lengths of 38", 44" and 50". Includes 35" tall mounting stake with cable-tie holes and two 10-32 x 1" stainless steel bolts and nuts. (Primary manufacturer source: Charles Industries OSP Mounting Accessories PDF; corroborated by distributor listing at Millennium.)