This set of RC helicopter training kit allows beginners to learn and practice and flying skills with ease. The kit includes sponge balls that act as a protective part, absorbing impact and preventing damage to the aircraft when or crashes. Features -Color:Assorted Color -Material:Plastic, sponge -Size:34.00X4.00X4.00cm/13.36X1.57X1.57in -Improve your experience with the training kit, designed to help you train and perfect your skills. -The sponge ball kit provides an extra protection during , ensuring your rc helicopter stays safe and secure. -It is made of strong and wear-resistant material, which is and not easy to be damaged. -This training gear is a must-have part for your RC helicopter, which can protect it from be damaged when practicing . -If your friends are the lovers of the RC helicopter, then you can present this practical accessory to them. Package list: 8 x sponge balls 8 x frame x rings 16 x binding wire