gravity PVC conveyor roller durable, low noise high quality, competitive price Gravity PVC conveyor roller Specification:Roller diameter38mm 50mm60mmShaft diameter8mm8mm12mmTube materialPVCBearing typePlastic bearing house, precision bearingLoading capabilityMid-duty Application: 1. applicable conveyor type: lighyt duty gravity roller conveyor2. travel goods: tobacco etc.3. applicable situation: ...