Czech seed beads in the shape of a short cylinder (known as PRECIOSA Tubes or PRECIOSA Pipes) which are produced using similar technology to that used of other types of seed beads, i.e. by cutting glass pipes with a round or square hole. The difference between Tubes and Pipes is visible at first glance. Tubes are cut straight, while pipes are cut diagonally. Tubes are made in sizes of 2 – 5 mm and pipes are made in sizes of 2.5 – 5 mm.

PRECIOSA Tubes include Macco (1 mm), Delica (1.3 mm) and Unica (1.6 mm) which are specific thanks to their small size.

Short name / Articles Sizes	Profile Hole	Images
Tubes-RH / 321 11 001 2 x 2 mm, 2.5 x 2.5 mm, 3 x 3 mm, 3.5 x 3.5 mm ,4 x 4 mm, 4.5 x 4.5 mm, 5 x 5 mm	round round
Tubes-SH / 321 12 001 1.3 x 1.3 mm, 1.7 x 1.7 mm, 2 x 2 mm, 2.2 x 2.2 mm, 2.5 x 2.5 mm	round square
Tubes-TwSH / 321 27 001 10 x 4 mm, 15 x 4 mm, 20 x 4 mm	round square twisted
Pipes Bevelled-RH / 321 51 001 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm	round bevelled round
Macco-RH / 321 11 001 1 x 1 mm, 2 x 1 mm, 4 x 1 mm	round round
Delica-RH / 321 11 001 1.3 x 1.3 mm, 2 x 1.3 mm, 4 x 1.3 mm	round round
Delica rounded-RH / 321 11 001 1.3 x 1.6 mm	round, rounded ends round
Unica-RH / 321 11 001 1.6 x 1.6 mm	round round