Click to expand Tap to zoom Rega - Arm Nut - Sleeved RB250/RB300 by Rega Save $0.00 $20.00 | / Sleeved Arm Nut RB250/RB300 - $20.00 Non-Sleeved Arm Nut - $20.00 Sleeved Arm Nut RB250/RB300 Non-Sleeved Arm Nut Sleeve 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Purchase In Store or by Phone Rega Arm Nut for RB250 RB300 RB600 tonearms.