Highlights:Size: 6"Interior support included at no chargeFewer code infractionsNo parts shortage on job siteCan be used for fixed offsets of 15 degrees slope or in pairs for offsets adjustable from zero degrees to 30 degrees slopeGreater angles are prohibited by UL standard 103 and by the terms of the product listingRequired: Locking bands (2 packaged with each elbow kit) allow 360 degree rotation and lock the components together in place at the exact offset requiredInsulated elbows can be used at the same two-inch air space clearance as chimney sectionsIncludes 2 elbows, 2 locking bands, an interior support, and couplers