REVERSIBLE CAM LIFT HINGE, 10" WIDE OD;STRAP HAS A PLASTIC CAM RISE STEM IN IT WHICH GOES INTO THE;FLANGE., NUMBER "1245" IS CAST ON STRAP & FLANGE.;1-3/8" OFFSET;TO REVERSE REMOVE CAP AND PUSH OUT CAM, REPLACE CAM;ON OTHER SIDE OF STRAP AND REPLACE CAP.