Material:Nylon resin, light and three-dimensional Process:3D printing Cage Size: As pictures shown. Ring Size: 43mm/48mm/52mm/55mm. Delivery List:1 cage + 1 snap ring + 2 dark locks Weight:Net weight is about 100g Carton packaging Note: There will be a little error in the size of the product due to the difference in measurement methods, measuring instruments, factory production batches, etc. Generally, the error of ±2 mm is normal, and it is not a quality problem or the size description does not match, thank you)