.5mm Stainless Steel 316 Inner Wall / Stainless Steel 304 Outer.
Vent fits over double wall insulated pipe no single to double adapter needed.
Vent is secured to insulated pipe with double wall clamp.
⚠ Warning: California Proposition 65
Use of this product can expose you to chemicals including soot, creosote, wood dust, and wood smoke containing carbon monoxide, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.