Fits ST-20 tube

Semroc Coupler for ST20 tubes 4" length(1pk) Craft Paper SEM-CPL-ST20-4

Semroc Coupler for ST20 tubes 4" length(1pk) Craft Paper     SEM-CPL-ST20-4 ID 1.952…

Semroc Tubing Coupler ST-20 2.0" Long Small Hole Punched SEM-HTC-20P

Semroc Tubing Coupler ST-20 2.0" Long Small Hole Punched SEM-HTC-20P Rice Paper Tubing Couplers are …

Semroc Tubing Coupler ST-20 2.0" Long SEM-HTC-20

Semroc Tubing Coupler ST-20 2.0" Long   SEM-HTC-20 Spiral Wound Rice Paper Made in the USA…