Specifications:
Outside diameter: 34mm/1.34"
Inside diameter: 29mm/1.14"
Height: 13mm/0.51"
Color: black
Total weight: 56g
Material: silicone
Package Includes:
10 x Air Pump Rubber Accessories

Note:
There might be 0-3mm or 0-3g error in the manual measurement, please take it into consideration, thank you!
The actual color of the item might be slightly different from the pictures due to the camera and light effect.