The tunnel is going to make sure your bladder will not explode when wearing this urethral insertion sex toy for extended periods.  Perhaps you want to cum with the plug in and this will be an experience to remember.

Color: Silver

Material: Stainless Steel

Package: Bag

Length: 9 cm/3.2 inches

Insert Length: 7.5 cm/2.9 inches

Insert Max Dia: 1.18 cm/0.46 inches

Glans Ring Dia: 3 cm/1.2 inches

Net Weight: 0.059 kg/0.13 lb/2.08 oz