SmallRig Cheese Bar with 1/4 Inch and 3/8 Inch Screw Hole 1091 is equipped with industry standard 1/4"-20 and 3/8"-16 threaded holes, which make it possible to mount on any 1/4"-20 and 3/8"-16 accessories. You can also mount it onto Red camera or Red Rig because it comes with the RED screw spacing . Fits following monitors: 619AH, 819AH, FA1011 and FA1013. Material(s): Aluminum Alloy Package Includes: 1 x Cheese Bar 2 x 1/4'' Screw 2 x M4 Screw 1 x 1/4'' Double Head Screw 1 x Hex Screw Net Weight: 58g