Although the actual specification may vary according to the manufacturer, the general designation concepts are the same. The U and G is commonly used by Yonex. The U specifies the weight of the racquet. The lower the number, the heavier the racquet. 2U, 3U, and 4U racquets are common. The G specifies the grip size. The higher the number, the smaller the grip size. G3, G4, and G5 racquets are common.
There are three parts of a tennis racquet. The part that you hold is the "grip". Above the grip is the "neck". Someone who holds their tennis racket by the neck is said to be "choking" their racquet; this is not the correct way to play. The part that you hit the ball with (and the largest part of the racquet) is called the "head". The part makes up the head is the "rim". As for a badminton racquet, I would assume that it's very similar.
The 2 parts of badminton grip are replacement grips and overgrips.
head, Wilson ,yonex Towel grips are good for few times but after that it becomes pretty hard so it's like gripping a dry towel
Grip tape is needed to have good tension with your racquet, the better you can hold the racquet the better of your game
grip size on tennis rackets is the diameter of the handle on the bottom of the tennis racket.
to get grip
There are only 3 grips :Penhold grip,Shakehands grip and minor grips :D
the "end" cap
Rubber
to get grip
the 2 common grips are the forehand and backhand