StreetRays [Originals] Universal Swivel Chute Blocker Plate (Adjustable to fit Most Mower Decks). All StreetRays [originals] parts are CNC cut right here in Central Texas, USA. Where precision & Quality finish is the main focus. Our parts are all Laser cut & CNC formed on our Amada press brake for reliable fit. This mulch plate is fabricated from 10ga and 1/4 thick USA steel sheet. Specification: (No Instructions Included). Discharge Hole width coverage: 15″ to 20″ approx. Discharge Hole height coverage: 4″ to 5.5″ approx. Swivel Arm mounting depth (from edge of deck): 2″ to 4.5″ approx. Swivel Arm mounting height (from top of deck): 1″ to 3.0″ approx. Installation Notes: (No Instructions Included). The installation will require drilling 2 to 4 holes on your mower deck and will require assembly of the universal chute blocker plate to fit your mower discharge opening. Once you determine the height & depth where the swivel arms need to be mounted and where the 2 uprights (anchors on the deck) that the swivel arms will attach onto, you can go ahead drill the 2 or 4 holes for stability and mount the upright brackets onto your deck then simply unbolt the factory chute by undoing just a few bolts and attach our chute blocker plate with the provided nylon locking hardware and you’re done! Our Universal Swivel (open / close) Chute Blocker Plate is designed to fit almost all walk-behind and sit-down mower decks in the market. The installation will require drilling 2 to 4 holes on your mower deck and assemble the universal chute blocker plate to fit your mower discharge opening. Once you determine the height where the swivel arms need to be mounted, then simply unbolt the factory chute by undoing just a few bolts and attach our chute blocker plate with the provided nylon locking hardware and you’re done! Please note that you should NOT tighten the nuts all the way tight because the nylon locking nuts will ensure they stay in place, you need the nut to be loose because that’s how the chute blocker can open and close without interference. Now you have mulch machine! Or rather, you have a zero turn mower than won’t throw rocks or any hazard randomly at your house / car / window / etc. This is essential when you’re working on long overdue / heavily grassed / weeded areas.