GB/T7984-2001 standard Width:100mm to 3000mm Fabric layer:1 to 10 layers cover Face:1.5 to8. ... 0mm non-face:1.5 to 4.5mm nylon fabric conveyor beltGB/T7984-2001standardThin belt body, high strength, impact resistance ... ,NN150,NN200,NN250,NN300,NN350,NN400,NN450,NN500 2. Width of body: 100mm to 3000mm.3. Fabric layer: 1 to 10 layers ...