DRITZ-Curtain Grommets. Customise window treatments and shower curtains with colourful grommets. These 2.5cm inner diameter plastic grommets will fit rods up to 2.1cm and they simply snap together-no special tools required! A template is included to help aid in placement and they can be easily removed with a screwdriver. This package contains eight grommets. Available in a variety of colours: each sold separately. Machine washable; do not tumble dry; do not iron; do not dry clean. Imported.