wool carders for spinning/ felting

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I'm just getting into felting , but these seem very expensive, even on ebay, £30 per brush, Can anyone suggest a cheaper alternative?

Also - can I brush out yarn/wool from knitting/tapestry to make roving?

many thanks

They don’t look dissimilar to dog brushes so that might be an alternative for starting out.

Try here, mini but will get you going.

www.winghamwoolwork.co.uk/wingham-mini-carders-pair.html