Leofoto LCH-2S is a lighter version of the LCH-2 tray designed for outdoor photographers who use laptops for post-processing. It has a 3/8'' mounting hole instead of the 1/4''. The tray is 8.9" and can accommodate almost all laptop sizes, with flanges on the four sides to prevent accidental dropping. It can be easily mounted on ball heads/tripods using the 3/8'' mounting socket and Arca standard dovetail. SpecificationsSize: 390x280mm / 15.35'' x 11.02''Weight: 603g / 1.33 lbsMounting hole: 3/8" Leofoto 16" Tray w/Tripod 3/8" Mounting Socket/Arca Swiss Dovetail Panning Base LCH-2S