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Hard nylon bristles on twisted G.I. wire, head 140 x 63 mm, overall length 400mm approx.

Hard nylon bristles, mounted on twisted G.I. wire, head 120 x 65 mm, overall length 500 mm.

For small test tube of 6-10 mm diam., head 10 x 70 mm, overall length 175 mm. Nylon White.

Nylon Bristles on twisted G.I. Wire, head size 125 x 10 mm, overall length 650 mm for pipettes and tubes from 8-12 mm dia.