The large end of this connector fits into Schedule 20 PVC, while the smaller end attaches to any 4" dust hose. The PVC connection requires silicone adhesive (sold separately) and the hose can be fixed with a metal clamp (sold separately). Schedule 20 (PVC sewer pipe) is thin walled PVC pipe commonly found at home centers.
The term "Schedule 20" merely refers to the wall thickness of the pipe. When inquiring at your local sources, it is best to ask for thin wall sewer/drainage pipe (rather than asking for "Schedule 20"). It may be difficult to find this pipe via online sources as it is typically sold in 10 ft. lengths.
WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood.