1、Standard Size: The universal E26 or E27 specification is suitable for most desk lamps on the market. Replaces old or broken socket keys. 2、Function: The lamp repair parts usually be used as replacing old or broken socket keys on your light and fan fixtures. 3、Easy Installation: The light knob makes it easier for elderly arthritis patients to open and close the desk lamp. 4、Package Content: 50pcs turn on off switch knobs, lamp switch replacement. Great replacement when the old one is broken or missing. 5、Application: It can replace the most of floor lamp, table lamp fixtures. Easy to install in few seconds, replace old fixture. Item Type: Turn On Off Switch Knobs Replacement Material: PVC 50 x Turn On Off Switch Knobs Replacement