Shop › Propagation Tubes Image 1 of 2 Image 2 of 2 Propagation Tubes $15.00 Handmade 3D printed black propagation holders from a local artist. Propagation tubes included. Made to be able to hang up! Quantity: Add To Cart Added! Handmade 3D printed black propagation holders from a local artist. Propagation tubes included. Made to be able to hang up!