You will want to get the needles as coarse or heavy as possible for the larger plastic tubes. The finer ones are more suitable for the thinnest tubes or inner tubes on metal tubes
How to join yarn and finish garments with a felting needle - The Blog - US/UK
The tube fly needle, Global FlyFisher
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Felting needles 40G - Fine - from 2pcs - UNICORN FIBRES
Close up of wool needle felting kit on wooden surface Stock Photo - Alamy
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40G M222 Felting Needle Bulk for Needle Felting Tool Kit 500pcs
Felting Needles- Triangular Point 40 Gauge, SIZE 40 felting needles: has the finest shaft for shallow, fine detailing work. This blade is thin and
Felting Needles -- Triangular Point 40 Gauge
Triangle Nonwoven Needle 15X18X42X3 1/2 R333 G1002 Equivalent to Yantex Needle
Felting Needles -- Triangular Point 40 Gauge – Great Lakes Fibers
Needle felt equipment and materials
Triangular Felting Needle for Needle Punching Machine - China Felt Needle, Non Woven Needle