Jobu Design Surefoot SF-NX4 7" Lensplate Jobu Design Surefoot SF-NX4 7" Lensplate - 3/8" Mounting Bolt - 1/4" Mounting Bolts (2) - 1/8" Allen Keys 5/32" Allen Key - Jobu Design 5 Year Warranty Compatible with: 400mm f/2.8, 500mm f/4, 600mm f/4 lens Warranty: Jobu Design 1 year warranty