Toy name: Classic Building Bricks Type: Compatible with LEGO 2x4 building bricks Material: ABS plastic Finished Dimensions: 1.57 x 0.78 x 0.78 IN Number of building blocks: 100Pcs Feature: 1. Compatible with LEGO 2x4 classic building blocks. 2. The building block system can be expanded to add more interesting elements to make your buildings more diverse and interesting. 3. Our products have passed the CPC certification, the quality is guaranteed, you can buy with confidence. Tips! Building block toys contain small particles. To prevent the danger of swallowing, children under 6 years old are prohibited from playing! The downloaded electronic version of the PDF assembly manual cannot be used, or you do not know how to download it, please contact me, I will reply you within 24 hours and send you the manual! All parts are quality checked before shipping, so if you find some parts missing or damaged, please don't worry, please contact us, we will ship it to you immediately for free.