SMALLRIG Rosette EVF Mount for NATO Rail System, for Zacuto Gratical HD EVF - 1583 Can be attached to a NATO rail for sliding up and down. An EVF mount for Zacuto Gratical HD EVF. The rosette is in standard style for ARRI adapter (31.8mm diameter). Can be attached to a Zacuto Gratical HD EVF with the 1/4''-20 screw on one end, the arm can swivel freely for adjusting the position of EVF. Net Weight:0.11Kg