Golf ball bag are built with premium 600D polyester and nylon mesh. It can protect the golf ball from scuffs and abrasions. The golf ball bag has a swiveling plastic spring that hangs from the golf club bag. Easy to carry when you train. Universal size 5.5 x 5.5 x 6.5 inches. It can accommodate up to 16 golf balls. Our golf ball bag provide a sliding pull rope lock on top of the bag to ensure items do not overflow.