An agricultural harvesting head for harvesting crops in an agricultural field, wherein the agricultural harvesting head is configured to be mounted on a combine harvester, the agricultural harvesting head comprising: an elongate frame that extends perpendicular to a direction of travel of the harvesting head as it travels through a field harvesting crops; a rear wall that extends vertically and extends horizontally in a direction parallel to the longitudinal extent of the frame; a conveyor system comprising a left side conveyor, a right side conveyor, and a center conveyor, wherein the left side conveyor is an endless belt conveyor configured to carry cut crop material laterally from the left end of the frame to a central region of the frame, wherein the right side conveyor is an endless belt conveyor configured to carry cut crop material laterally from the right end of the frame to the central region of the frame, and wherein the center conveyor is disposed to receive cut crop material from both the left side conveyor and the right side conveyor and to carry the cut crop material rearward through a hole in the rear wall; a plurality of support arms extending forward from a rear portion of the frame; a reciprocating knife fixed to forward ends of the plurality of support arms; a support strip fixed above the plurality of support arms and extending laterally across the top of the plurality of support arms and disposed below one of the endless belts; wherein the left side conveyor and the right side conveyor extend across the plurality of support arms behind the reciprocating knife, and wherein each of the conveyors comprises an endless recirculating belt supported on an idler roller and a drive roller; characterized in that a plastic wear strip is fixed to an upper surface of the support strip to support a return run of the endless recirculating belt. an elongate frame that extends perpendicular to a direction of travel of the harvesting head as it travels through a field harvesting crops; a rear wall that extends vertically and extends horizontally in a direction parallel to the longitudinal extent of the frame; a conveyor system comprising a left side conveyor, a right side conveyor, and a center conveyor, wherein the left side conveyor is an endless belt conveyor configured to carry cut crop material laterally from the left end of the frame to a central region of the frame, wherein the right side conveyor is an endless belt conveyor configured to carry cut crop material laterally from the right end of the frame to the central region of the frame, and wherein the center conveyor is disposed to receive cut crop material from both the left side conveyor and the right side conveyor and to carry the cut crop material rearward through a hole in the rear wall; a plurality of support arms extending forward from a rear portion of the frame; a reciprocating knife fixed to forward ends of the plurality of support arms; a support strip fixed above the plurality of support arms and extending laterally across the top of the plurality of support arms and disposed below one of the endless belts; wherein the left side conveyor and the right side conveyor extend across the plurality of support arms behind the reciprocating knife, and wherein each of the conveyors comprises an endless recirculating belt supported on an idler roller and a drive roller; characterized in that a plastic wear strip is fixed to an upper surface of the support strip to support a return run of the endless recirculating belt.