E3D V5 Break Without Teflon Tube/3.0mm FilamentThese stainless steel All Metal (no PTFE inside) heat break barrels are compatible with metal V5 J-Head Direct Feed hotends for 3.0mm filamentPlease see supplied drawing for barrel dimensions and detailsSpecifications:Thread size: M6x1Length: 26mmPackage contents:1 x Stainless heat break barrel for All Metal J-Head.