Compatible with : PTH-460 PTH-660 PTH-860/ DTH-1320 DTH-1630/ DTK-1661 DTK-2261 DTK-1660 DTK-2260DTK-2421 DTK-2420 DTH-2420 DTH-2421 DTH-3221 DTH-3220DTH-W1329 DTH-W1321 DTH-W1620 DTH-W1621DTH-1320. Widely used for Pro Pen 2/3D-/ Slim Pens.
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