The Packard PVL3434 is a variable pitch single groove pulley with a 3.15" outside diameter and a 3/4" bore diameter. The Packard PVL3434 is part of Packard's PVL line of light duty pulleys for 3L, 4L, 5L, A, and B v-belts. The Packard PVL variable pitch single groove pulleys are adjustable based on the needed air flow or speed requirement. These pulleys are furnished with standard keyways and hollow head set screws.