Materials Frame: Aluminum Embroidery thread Guts: Polyester Length: 6.3cm Weight: Lightweight aluminum Strap: Rubber cord Polyester Plastic With bell Mini Racket: Thank you for your interest. Everything from shaping the frame is handmade ^^ It's detailed work, but I make each one carefully and enjoyably. Tennis bag, racket case, backpack, small items case, school bag, etc. I hope you enjoy attaching it to your favorite things ^^ How about a small gift for tennis friends, friends, or family? Each one is individually wrapped.