TRAULSEN. P/N: 239157. SPRING DOOR HINGE CARTRIDGE MECHANISM., OVERALL DIMMENSIONS: 5 1/8" LONG X 1 1/16" WIDE X 1" THICK., HAS A MALE 1/4" LONG THREADED STUD AT THE END OF THE STEM., THE STEM IS 1 1/2" LONG X 7/16" WIDE X 5/16" THICK., THE CASE IS 3 5/8" LONG., THERE ARE THREE THREADED MOUNTING HOLES ON BACK OF CASE FOR #10-32 MACHINE SCREWS., ZINC PLATED METAL., SPRING LOADED CARTRIDGE., METAL, NYLON, PLASTIC CONSTRUCTION., SILVER AND WHITE COLORED., HAS SP476 STAMPED ON BACK OF CASE., ORIGINAL GENUINE TRAULSEN OEM REPLACEMENT PART., GUARANTEED TO WORK PERFECTLY., BRAND NEW CONDITION., NEVER USED., INCLUDES: ONE SPRING HINGE CARTRIDGE AND PACKAGING., I CAN SUPPLY MORE PICTURES IF REQUESTED.