We noticed you have a Duct Seal Kit in your cart. Do you want to add a handle assembly which required to use the duct seal kit? Add Handle Assembly (58200-000) to cart.
Thumbnail Filmstrip of Test Slug - Aluminum for 3-1/2" Diameter Sched.40 Duct Images
Note: The image shown is for illustration purposes only and may not be an exact representation of the product.
Aluminum Test Slug for 3-1/2" Diameter Schedule 40 Duct. They are simple aluminum mandrels designed to be pulled
through the duct to test for out of roundness.