It's the professional way to run your pipe and wire projects. The ThermoThimble™ provides an air tight outside wall penetration by using high-density foam gaskets to keep out air, insects and other pests. It allows you to run electrical, plumbing and A/C line sets through outside walls while stopping snagging and creating a permanent, air-tight seal through walls, while leaving no ugly holes to patch. This innovative product installs easily on siding or masonry walls and saves labor costs. It is suitable for new construction or retrofit, for both residential and commercial applications. These wall thimbles also give a custom, professional look to installations by cleaning up insulation foam around the foundation.