●Clamping Knob Head OD: 24mm/0.94"(25# M4); 30mm/1.18"(25# M6); 37mm/1.46"(38# M8); 37mm/1.46"(38# M10). ●Female thread star shaped knobs are made of plastic, with good toughness and strong anti-aging ability. The surface of the nut is galvanized and corrosion resistant. ●Widely used in furniture decoration, electronic equipment, mechanical equipment and other related industries. ●Sizes: 25# M4, 25# M6, 38# M8, 38# M10; great replacement for your broken ones and different replacement purpose. ●Package Content: 8 pcs * M4 thread clamping knob + 8 pcs * M6 thread clamping knob + 8 pcs * M8 thread clamping knob +8 pcs * M10 thread clamping knob.