20 paper tubes with plastic plugs, ready to use.
The paper tubes where only designed for the mason bee breeding and are mainly used by the red mason bee but also by the horned mason bee. The tubes become bundled and attached on the specific spot, ideally close to other nesting sites and necessarily protected from rain.
The mason bees only accept the tubes, if they are closed on one side. We use a black plastic plug for that purpose.
Dimensions: 7,5 (9) or 9 (11) mm x 150 mm