These bobbins fit Irish tension wheels that we currently make. Some also fit older Irish tension wheels:

• The standard lacquered bobbin fits all Louët Irish tension wheels, including older wheels—S10, S51, S20, S60, S70, S71, S75, S76, S77.
• The unlacquered standard bobbin is recommended for the unfinished S17, S15 and S75 wheels.
• The Bulky bobbin will fit older wheels whose original flyer was a bulky flyer. The Bulky bobbin fits the current Bulky and Art yarn flyers.
• The high speed bobbin and high speed bobbin with fat core fits all our Irish tension spinning wheels except the S70, S71, and S90. The fat core simulates a half-full bobbin, which makes spinning very fine fibers easier.