The image shows a pair of motorcycle handlebar grips.
Handlebar grips are a primary contact point between the rider and the motorcycle, providing comfort, control, and protection for the hands. 
They are commonly made from materials like rubber, silicone, or foam, with different compounds offering varying levels of durability, grip, and comfort. 
There are different styles, including push-on grips that slide onto the handlebar and lock-on grips that use a clamp for a more secure fit. 
The standard diameter for the grip area on most modern adult bike handlebars is 22.2mm, which makes it easy to replace or upgrade grips.