The Gardner Bender BVS-240 PVC Plug Set, 2-Inch to 4-Inch prevents conduit from collapsing or deforming by supporting the inside surface during heating and bending. It decreases heating time by trapping the hot air in the conduit; this is used with 2-Inch and larger conduit. A durable storage case in included. Since 1959, Gardner Bender branded electrical tools, voltage testers, wire management products and professional equipment have been a mainstay with electrical contractors. Gardner Bender's approach of offering superior quality at an affordable price makes them an attractive choice for those who prefer putting more money in their pockets than into the job. In addition, Gardner Bender offers industry leading innovation, offering a solution based approach with product designs and features based on end-user feedback.