(Defective Closeout Sale: Yellowing), Plastic Spools, For Beading Wire Thread String, Wheel, WhiteSize: about about 55mm in diameter, 20mm thick, axle: 25.5mm.â Material: made of hard material, not easy to break, can use for a long time. â Usage: This mini thread holderl is used to help you subpackage your thread, various wire especially when you're out, not conveniently to bring many big spools. â Tips: The surface is a little yellow, but does not affect the use