1.Brands:MARUICHI, STUBE,U-LI, AMBER 2.Standard:BS31 3.BSI/ISO 9001/TUV/CNAS 4.UK,Dubai,Asia,South ... safe ConduitPlain Seam, bendableHigh Zinc CoatingBSI,UL,TUV,GMC,ISO9001Size:1/2"~2" BS31-1970/IEC61386 SizeOutside Diameter(mm)Wall ... 0.1516.7017.501.000±3%1-1/4"31.6031.751.65±0.1518.3019.101.278±3%1-1/2"37.8038.101.85 ... ±0.1519.1020.601.660±3%2"50.5050.802.05 ...