... the standard size, we can also manufacture according to customer plastic roller type gravity expandable conveyor 1. function:Flexible Roller Conveyor ... per meter, 500kg totally.Rollers: 2''(50mm) OD(Outside Diameter), plastic double roller, 11 rollers per sectionSide Links and ConnectionsBox Stop ... roller or micro can be more convenient, more effort. plastic roller type gravity expandable conveyor