Featureā—¸Features: Screw diameter: M6 seat diameter: 1.0 inches (25 mm). Material: Thread: Iron/ABS resin, PET + PET fiber felt. The seat surface is cushioned felt to prevent scratches on the floor. Requires female threads on the mounting sideā—¸Specifications: Size: M625 Pie BEDescription Prevents tables, chairs, furniture and more from touching the floor directly.