Pyrex glass tunnels available from 8g(3mm)-4"(10cm).
Plug/tunnels/ear.

All of our glass is made in the USA.

Price displayed is for single pieces.

item numbers
gtdf8 -8g (3mm)
gtdf6 -6g (4mm)
gtdf4 -4g (5mm)
gtdf2 -2g (6mm)
gtdf0 -0g (8mm)
gtdf00 -00g
gtdf-7/16" (11mm)
gtdf-1/2" (13mm )
gtdf-5/8"(16mm)
gtdf-3/4"(19mm)
gtdf-1"-(25mm)
gtdf-1 1/4"(32mm)
gtdf-1 1/2"(38mm)
gtdf-1 3/4"-(44mm)
gtdf-2"(50mm)
gtdf-2 1/4" (56mm)
gtdf-2 1/2"(63mm)
gtdf-2 3/4"(69mm)
gtdf-3"(75mm)
gtdf-3 1/4 (81mm)
gtdf-3 1/2 (88mm)
gtdf-3 3/4(94mm)
gtdf-4"(10cm)