Description: 【Versatile HO Scale Compatibility】: Designed specifically for HO scale model trains, these LED light accessories are for enhancing the realism and functionality of your 1/87 electric train models 【 Material】: Crafted from ABS, these signal lights bulbs are design to sturdy for long term use  【Led Light Modification】: These small LED bulbs are ideal for customizing and upgrading your train models, providing bright and efficient lighting to improve visibility and detail 【Compact Size 】: Measuring approximately 11cm/4.33inch in length, these signal lights offer a fit for intricate detailing on your model train setups without overwhelming the design 【 Pack of 100 Pieces】: Each includes a comprehensive set of 100 pieces, ensuring you have ample supply to complete multiple projects   Size Chart: Length:11cm/4.33inch Package Includes: 100 Model Trains HO Scale LED Lamp Note: Please allow slightly errors 1-2cm differences due to manual measurement.