Knight II The Knight II has a square shape with “X” grid design and pyramid top. Fits up to an 13″x 13″ flue.Base: 1′-4″Height: 3′-2″Weight: 20 lbsOverview Quick SpecsInstallation Instructions Fireplace Compatibility: Clay Tile/ Masonry Pre-engineered B-vent Approved Fireplace Systems Specifications (for architects) Proportion Recommendations Ways to Use Our Chimney Pots Approved for Use with These Fireplace Systems: Fire RockHeat N GloKozy Heat Mason LiteNapoleonRumsford SonoranVermont Castings UL-approved for standard masonry fireplaces FMI/Desa IsokernLennoxMendotaQuadra-FireSelkirkTown and CountryHeatilatorKingsmanMajesticMonessenRegencySimpson Duravent Travis Industries Copper Finish Freedom Grey Finish Call 800-391-0014 for more information.