... products are belt conveyor, bag filters, and belt conveyor accessories, including rollers, pulleys and roller frames, etc. With a wide range, ... mine, port, building materials, chemical and other industries. The conveyor idler roller specification:1 .Roller Diameter:76-219mm. 2 . ... the pressure sameness, so the roller turn unimpeded . belt conveyor roller with frame passed ISO9000 in machinery in china