It is our pleasure to offer you high quality products and exceptional service. We would now like to thank you for your support and cooperation. Technical specifications: Material: Liquid Silicone Item size: S:32*3cm M:48*4.5cm L:65*6cm tail long 48cm Packing list: 1 * butt plug with tail Instructions for use of luminous daytime 1. Direct sunlight for 5 minutes, place it indoors, and use it with the curtains drawn 2. Open the curtains, place the sun on the windowsill for 15 minutes, and use it with the curtains drawn dark night 1. Put it under the indoor LED light, irradiate for 30 minutes, turn off the light and use 2. Place it under the LED desk lamp (within a distance of 10cm), irradiate for 20 minutes, turn off the lamp and use it Note: 1) Please clean before and after use. 2) Please use with water-based lubricant Note: due to the measurement method and measuring instruments different, so the size may have a little deviation, this not belong description error.