Packing: 4pcs Material: plastic Color:white+red Total length:9cm/ 3.54in, applicable diameter range:20.3-23.3mm / 0.79-0.92in Sturdy, highly durable and environmentally safe, long service life Dual-hole design, flexible, waterproof and lightweight, high light transmission, wear-resistant, high temperature resistant, stable performance, easy to carry out of the house Instructions for use:Simple to use, just cover it with the flashlight head. Suitable for flashlights with a diameter of 20.3mm - 23.3mm, widely used in flashlights, LEDs, etc.