You are buying a stainless steel 4g body piercing needle receiving tube . These tubes can accept up to a 8g needle. One end has a 45 degree angle and the other is end is a flat 90 degrees.
These tubes are of high grade stainless steel; the tools commercial piercers use. Professional grade for regular use and autoclaving.
Buy with confidence; you will receive the item as described. Check my eBay store, Scrap Metal 23, for other listings.