BB Ball Bearing

BB Ball Bearing It is challenging to 3D print a bearing that rotates smoothly. Therefore, a bearing has been developed that utilizes 6mm airsoft BBs.Eight different sizes are available. Assembly Instructions:Insert the specified number of BB balls listed into the gaps between the inner and outer parts by placing them into the provided notches.TypeInner Dia.Outer Dia.WidthNum. of BallB3B622762277B3B824882488B3B10268102689B3B122881228810B3B143081430811B3B153281532812B3B173481734813B3B193681936814