It is the batch file of our new collection. It includes 22 models and 8 lengths each. There are 176 stl files and 22 3dm files in total.We are happy to present our new collection to you.A wonderful collection of 22 pieces. Weight information and stone measurements of the entire collection are available in the pictures. Sizes= (16-16.5-17-17.5-18-18.5-19-19.5).You can buy our products to support us,Comment on our products and leave a like. Thank you for choosing us. We will always continue to produce for you.