Amazon.com : Haoge CP-64 Quick Release Clamp with RC4 / 400PL Base Adapter Convertor for Manfrotto RC4 System to Arca-Swiss Compatible, Fit 400PL / 405/410 / RC4 : Electronics
Manfrotto 468MGRC4 Hydrostatic Ball Head w/RC4/410PL Quick Plate
Amazon.com : Haoge CP-MAS Quick Release Clamp with RC4 / 400PL Base Adapter Convertor for Manfrotto RC4 System to Arca-Swiss Compatible, Fit 400PL / 405/410 / RC4 : Electronics
Manfrotto 405 Pro Digital Geared Head With RC4 Rapid Connect Plate | Full Compass Systems
Converter Arca Quick Release Plate to Manfrotto RC4 405 Tripod Ball Head Clamp | eBay
Manfrotto MS050M4-RC4 L Bracket, 33.07 lbs Load Capacity, 410PL QR Plate 719821338567 | eBay
3-Way Pan/Tilt Tripod Head with RC4 Quick Release Plate - 808RC4 | Manfrotto US
File:Manfrotto 488 RC4.jpg - Wikimedia Commons
Manfrotto 055 Magnesium Ball Head With RC4 Quick Release (MH055M0-RC4) Tripod Head at KEH Camera
Manfrotto 410PL Quick Release Plate - for RC4 Quick Release System - The Camera Exchange