Key features:

Size app: Length: 2.5cm

Small Hole: Outer Dia:1.1cm,Inner Dia:0.6cm

Large Hole: Outer Dia:1.6cm,Inner Dia:0.85cm

Material: Rubber

Color: As picture show

Conversion: 1cm=0.39inch/1 inch=2.54cm

Seller name:dentree02
City,State:Zhengzhou City，Henan Province，China
Telephone number:86-18838820020