Harrows Supergrip Carbon Shafts – Ultra Strong Stems. Includes machined rings. Length: 45mm; (does not include thread – 5mm) Thread: 2ba Harrows Supergrip Carbon Dart Shafts – Black & AquaHarrows Supergrip Carbon Shafts – Ultra Strong Stems. Includes machined rings. Length: 35mm; (does not include thread – 5mm) Thread: 2baHarrows Supergrip Carbon Shafts – Ultra Strong Stems. Includes machined rings. Length: 40mm; (does not include thread – 5mm) Thread: 2ba