Designa Multiline Aluminium Shafts – Regrooved Dart Stems. Each pack contains 3 stems. Length: 53mm. (does not include thread). Thread: 2ba Designa Multiline Aluminium Shafts – Regrooved – BlueDesigna Multiline Aluminium Shafts – Regrooved Dart Stems. Each pack contains 3 stems. Length: 29mm. (does not include thread). Thread: 2baDesigna Multiline Aluminium Shafts – Regrooved Dart Stems. Each pack contains 3 stems. Length: 35mm. (does not include thread). Thread: 2baDesigna Multiline Aluminium Shafts – Regrooved Dart Stems. Each pack contains 3 stems. Length: 41mm. (does not include thread). Thread: 2baDesigna Multiline Aluminium Shafts – Regrooved Dart Stems. Each pack contains 3 stems. Length: 47mm. (does not include thread). Thread: 2ba