Mariplast manufacture wide range of yarn carriers-- RovingRubbing bobbins, Ring Frame tubes, parallel tubes, cones of different conicity, in different weights and material compositions-- Polypropylene (PP), PP + Glass Fibre and Polycarbonate,Polyamide, Polyamide+ Glass Fibres, ABS etc Mariplast yarn carriers are available in a wide range of (24) colours for easy identification of yarnscounts.