Long size: th e length o f cage：9cm-6.5cm / 3.54"-2.55". Short siz e: the length of cage：7cm-5cm/ 2.75"-1.96". Two kinds of cage to cho ose: Sh ort(7cm) / Long(9.5cm ). Cage size: 9cm 3.5(3.4)cm. Soft Silicone, Comfortable to wear and The shape is very popular.
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