1-Material: Aluminium frame 2-Thickness of Alu pofile:1.2mm 3-With magnet on the bottom.

Spirit level

With its good quality and favor price  provide you more benefit.

SPEC	QTYS(pcs)	MEAS(cm)	GW/NW(kg)
400mm	60	41.5*31*27	22/21
450mm	60	46.5*31*27	25/24
600mm	60	61.5*31*27	32/31
800mm	30	81.5*26*27	22/21
900mm	30	91.5*26*27	25/24
1200mm	30	121.5*27*17	32/31

aluminium spirit level