Fits BT-3.0"H tube

Semroc Coupler for BT-3.1 tubes 8" length(1pk) Craft Paper SEM-CPL-3.1-8

Semroc Coupler for BT-3.1 tubes 8" length(1pk) Craft Paper    SEM-CPL-3.1-8 ID 2.99" OD …

Semroc Coupler for BT-3.1 tubes 6" length(1pk) Craft Paper SEM-CPL-3.1-6

Semroc Coupler for BT-3.1 tubes 6" length(1pk) Craft Paper    SEM-CPL-3.1-6 ID x.x" OD x…

Semroc Coupler for T-3.0 tubes 6" length(1pk) Craft Paper SEM-CPL-3.0-6

Semroc Coupler for T-3.0 tubes  6" length(1pk) Craft Paper    SEM-CPL-3.0-6  ID…

Totally Tubular Coupler CPL-3.0" x 34"(1pk) TT-CPL-3.0-34 Discontinued

Totally Tubular Coupler CPL-3.0" x 34"(1pk)  TT-CPL-3.0-34 1 pack ID ” OD 2.92” …