Earring hook is 925 Sterling Silver (Hypo-allergenic) Very lightweight! You'll barely feel them! Each pair of earrings have slight variations, its all random selection when we ship these to you! We have many more designs to come, so stay tuned and thanks for looking! Follow us on Instagram or TikTok for updates: @SuperchickCrafts OR Like us Facebook Page! www.facebook.com/SuperchickCrafts