Set of8New wheel Shower Door Rollers Excellent quality Copper Height Adjustable 25m X6mm wheels suitable for many makes For curved and quadrant cubiclesGlass hole fit14-18mm Quick dispatch usually the same day!Supplied as a pack of 8 suitable for many different makes. Uses 304 grade stainless steel balls. Brass shaft 6mm thread with offset holes through nuts and washers to allow for height adjustment desined to suit 16mm glass hole. Wheel diameter 25mm x 6mm.