😊When young children start to ride a bike,the first thing they need to gain is a sense of balance. Training wheels or stabilizers are an additional wheel or wheels mounted parallel to the rear wheel of a bicycle that assist learners until they have developed a usable sense of balance on the bicycle. 😊The kids bike stabilisers is very sturdy and simple to install suit for 12 14 16 18 20 Inch Training Wheels. 😊Please note that slight color difference should be acceptable due to the light and screen. Specification: ✔ Material: Steel + Plastics + Rubber ✔Color: Blue ,Black, Red,White, Purple, Rose ✔Size: Wheel: 4.33 inch*4.33 inch*0.98 inch /11cm *11cm*2.5cm Bracket Arms: 10 inch*1.1 inch / 25.4cm*2.8cm ✔Fit: 12/ 14/ 16/ 18/ 20 inch Bicycles INSTALLATION NOTES: 1.Insert bolt through the wheel, washer and training wheel arm. 2.Attach and tighten washer and nut, you will require two wrenches to tighten this propeily. 3.Remove rear axle nut from the bicycle wheel axle. 4.Insert axle though locking brace and fix the raised point to the bicycle frame ends . 5.Determine desired height of training wheels when attached the training wheels should have about 0.5-1cm (1/5 to 3/5in) space from the ground. 6.Tighten axle nut with adjustable wrench . 7.Repeat for another suide.