PACKAGE INCLUDE: You will get 16 x adhesive castor wheels. The sufficient quantity will meet your daily needs and replacement.MATERIAL AND SIZE: A dhesive castor wheels are made of high quality ABS and 304 stainless steel ball. Durable, wear resistant roller stand good bearing capacity. The length of the adhesive castor wheel is 1.77 inch (4.5 cm) and the width of adhesive castor wheel is 1.10 inch (2.8 cm). Please note that the measurement of the size is not necessarily accurate, and there may be a little deviation.INSTALLATION METHOD: You need simply peel the film on the back, then firmly press onto the smooth surface, and suggest to wait for 24 hours that will be better when using.COMFORTABLE TO USE: The silent wheels are stable and quiet, will not scratch the ground, which is not easy to shake when pushing.Silent wheels can slide to any angle without limit, completely silent during using,help you easily pull storage boxes and small furniture, which is very convenient and labor-saving.SCOPE OF APPLICATION: Self adhesive castor wheels can be used for many purposes, such as storage boxes, trash cans, ordinary cartons and other items. It is also a perfect DIY accessory, suitable for children's toys, crafts, small projects, move the heavy pots by slight pushing, so convenient.