Straight Running Chains-SINGE HINGE CHAIN And the flat top chain have various items. FLAT TOP CHAIN(PLASTIC) 820/831 STRAIGHT RUN 880WD SIDE FLEXING 880TAB SIDE FLEXING 880Y SIDE FLEXING 880BS SIDE FLEXING 879BS SIDE FLEXING 821 STRAIGHT RUN .These chains are wide used in food ,beverage,pharmaceutical and other industrial fields.[...]