Check the listing for details. Canon 600mm f/4 L IS III foot replacement 4 arca swiss kirk markins rrs acratech. Condition: New. Listed at 79.00 USD. Part Number # CFR-003Product Description: New Hejnar Photo Quick Release foot replacement for: Canon 400mm f/2.8 L IS III USMCanon 600mm f/4 L IS III USMCanon RF 400 f/2.8 L IS USMCanon RF 600 f/4 L IS USMCanon RF 800 f/5.6 L IS USMCanon RF 1200 f/8 L IS USMCanon RF 100-300 f/2.8 L IS USMTo remove the Canon original foot use provided hex key that comes with the CFR-003.To install the CFR-003 , use the four provided screws and secure foot to the lens collar.If your mounting screws loosen over time, consider using of LocTite 242 for security. Lens Foot incorporate Quick Detach socket to attached a standard push-button QD mount. Use the QD socket to attached a standard push-button QD mount. QD system has been used for years by industries around the world including NASA, law enforcement and military agencies. The design inhibits accidental removal, especially when the camera is hanging from the strap. Attach your favorite strap to the clamp, then mount the clamp to any of Arca Type plates , L brackets or Foot Replacements. Straps are available at eBay, Amazon, Cabala's, Bass Pro and other stores with sporting fishing and military equipment. My favorite strap is Black Rapid. Compatible with:Markins including level release clampReally Right Stuff, including level release plate.Arca SwissWimberleyKirkPhoto ClamFoba Vanguard ABH Series Ball Heads (ABH is Vangaurds only Arca-Compatible series)Custom BracketsJobu DesignsAcratechOther Arca swiss type products Specification:Length 4.9 inch.Width 1.7 inch. Weight 4.3 oz (121g)1/4-20 taped holes.QD ( Quick Detach) Socket build inDouble-dovetail design allows for dual clamping surfaces on railPrecision C.N.C. machined from 6061-T6 AluminiumCompatible with Kirk, R.R.S., Arca-Swiss, and many other Arca-Swiss style Quick release clamps.Stainless steel hardware.Two safety stops. This prevents free fall when the clamp is not fully closed. (M3 screws)Made in USABlack hard coat anodized surface.Auction Includes:One replacement foot with four mounting screws Hex key for M3 stop screw and mounting screwsShipping Information:Free Shipping with USPS First Class Mail. Tracking information provided. USA Costumers please note that USPS packages may travel much longer than the estimated delivery time and tracking information is not always updated daily. If your order is time sensitive, you need daily tracking update please use FedEx, UPS or Express Mail as delivery service during checkout.