... 3.Pole size:63*320*910mm 4.Belt lenth:3M Name: High quality steel adjustable belt queue barrier Brife introduction:1. Enterprise introduction ... in the Shanghai World Expo in Year 2010. 2.Function: Used at many public events, protect person safe, keep order, ... prevent accidents and control crowd.3.Use occasion: mainly used in Bank, Supermarket, Hospital, Shopping Mall, Subway, Exhibition, ...