Product Description Screw dia separated:

1/4" x 16 ; 20 ; 25 mm

3/8" x 16 ; 20 ; 25 mm

5/16" x 16 ; 20 ; 25 mm

Bottom of leveler : 30 mm

Material Cover: PE ; Screw: Steel

Surface Treatment Cover: Nickel 

Bottom of leveler: White 

Hexagon Leveler Function Explanations: Mounting for table / chair / cabinet furniture's bottom of legs.