Spirit Level Hose Spirit Level Spirit Level 25 m 1/2 Inch – 2 x plastic installations Acrylic glass meßröhren (cm division) – graduation: 0 – 10 cm ( mm Division) – messrohr Ø: 1/2′ 12 mm – pipe outer diameter: 10 mm, hose inner diameter: 8 mm. – Hose length: 25 m, messrohr length: 21 cm