Fits BT-3 tube

Semroc Balsa Nose Block or Coupler BT-3, 0.75" Long SEM-NB-3

Semroc Balsa Nose Block or Coupler BT-3, 0.75"   SEM-NB-3 Precision Turned Balsa Made in t…

Totally Tubular Coupler(1pk) TT-CPL-3-5-34" Discontinued

Totally Tubular Coupler Stock CPL-3-5-34"  1pk Spiral Wound Paper Tube ID 0.371” OD…

Semroc Coupler for BT-3 tubes 1" length(1pk) Craft Paper SEM-CPL-3-1

Semroc Coupler for BT-3 tubes 1" length(1pk) Craft Paper    SEM-CPL-3-1 1 pack ID 0.250&r…