Vertically, what is distance between top and bottom mounting holes on the wall plate?

The vertical distance between the mounting holes can be within the range of 100mm to 400mm (4 to 15.7 inches).

what is the screw size for this mount?

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Questions & Answers: VideoSecu Dual Arm Swivel Tilt TV Wall Mount for most 32 40 42 43 46 47 48 50 55 inch Samsung Panasonic Sony VIZIO Toshiba Insignia Sceptre Phillips LED LCD HDTV Plasma with VESA up to 400x400mm BGW

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VideoSecu Dual Arm Swivel Tilt TV Wall Mount for most 32 40 42 43 46 47 48 50 55 inch Samsung Panasonic Sony VIZIO Toshiba Insignia Sceptre Phillips LED LCD HDTV Plasma with VESA up to 400x400mm BGW

Premium quality/ Level adjustment/ Cable management
VESA 400/300/200/100mm
Load capacity 135lbs / 61kg
Tilt forward 15 degrees or backward 5 degrees . Swivel from side to side. Rotate 10 degrees. Extend up to 16"

$32^.85 –