Selkirk DSP 6″ Double-Wall Masonry Adaptor

Selkirk; Selkirk DSP 6″ Double-Wall Masonry Adaptor; 77355 Overall length is 11-3/4. Compatible only with DSP Double-Wall Black Stove Pipe. Features: Material: 430-alloy stainless steel inner wall, steel outer wall. Limited Lifetime Warranty. Use with SuperPro and Ultra-Temp factory-built chimney. Reduces clearances from 18 to 6 for both walls and ceilings. Specifications: Overall Dimensions: 6 (W).