Safety DesignThis child bike seat attachment for adult bike has a handles ,guardrail handrails,breathable thicker seat cushion and backrest and footrests.Your child's feet can rest comfortably on the pedals, and the thick cushion is soft and breathable.Make sure to enjoy the ride with your child in comfortable conditions.Under 100 PoundsThe back mount child seat are specially designed for children under 1-7 years old children and under 100 pounds.The combination of iron sheet and bandage provides double safety for the seat.The design and manufacture meet the top quality standards of safety and comfort. The thickened and widened cushions for child sitting, more comfortable.Removable Handrail & High quality materialsIn order to adapt to children of different ages,this back child seat for bike guardrail and handle are removable at any time, which can adapt to children of different ages. made of steel, which is strong and durable. Thickened and waterproof seat cushion gives your child comfortable. The guardrail hand guard is made of breathable open-cell sponge material, which is breathable and non-slip. High quality materials which not only makes it super solEasy to Install& RemovableComes with installation tools and safety belts, powerful quick disconnect assembly for easy installation and removal of seats.The combination of iron sheet and bandage allows the seat to be securely to fixed on any standard bicycle flat bicycle frame,This accessory is suitable for almost all seatposts, and mountain bikes, electric cars, etc.Matters needing AttentionThe length of the bicycle rear frame must be greater than 10.23 inches, and the width must be less than 7.87 inches. So It suitable for all types of bikes with a rear rack, such as mountain bikes,If you can't judge whether the model is compatible, you can contact me, I will be at your service at any time.