Pinit Please Contact Customer Service for Availability SMA Upgrade kit DC surge protector (type I+II) for series STPxx-50 SKU: SMA-DC_SPD_KIT7_T1T2 SMA Upgrade kit DC surge protector (type I+II) for series STPxx-50 Login for pricing DESCRIPTION SPECIFICATIONS PDFS, DOWNLOADS & VIDEOS SMA Upgrade kit DC surge protector (type I+II) for series STPxx-50