USED SHERMAN & REILLY , 10" X 2" (Outside diameter of guide, inside pulley is 8")SINGLE CABLE HEAVY DUTY TRANSMISSION STRINGING BLOCK AS SHOWN ABOVE AND BELOW. UNIT IS STAMPED "B" BELL SYSTEM AND THAT IS THE ONLY REFERENCE I CAN FIND ON THE UNIT. THIS UNIT IS EXTREMELY WELL MADE WEIGHING 35LBS.
