Standard Size: The universal E26 specification is suitable for most desk lamps on the market.Function: The lamp repair parts usually be used as replacing old or broken socket keys on your light and fan fixtures.Easy to Install: For older arthritic patients, the light knobs make it much easier to turn the table lamps on and off.What You Get: 4 pcs small size 2cm/0.78in + 4 pcs medium size 3.5cm/1.378in + 4 pcs large size 5cm/1.967in.After-sale Service: If you have any questions with our switches knobs, please feel free to contact or QA us, we will provide you satisfied solutions. Product Description Specification: Material: Plastic Color: Black Size: Small Size: 2cm x 1.3cm / 0.78inch x 0.51inchMedium Size: 3.5cm x 1.3cm / 1.378inch x 0.51inchLarge Size: 5cm x 1.3cm / 1.967inch x 0.51inch You will receive 12 pieces of switch knobs with different sizes, sufficient quantity can meet your daily replacement demands, will bring a lot of convenience to your life. US standard universal knob, suitable for most desk lamps on the market. Caution: Turn off electrical current at source before installing the light knobs on lighting fixture or portable lamp. Note: Please keep away from children and pets as the items are small. Track Page Views WithAuctiva's Counter