The Piper Range Wood ,Blackwood Oil. Bottle of Wood Oil by RG Hardie. Plastic Bagpipe Mouthpiece by RG Hardie. It is suitable for most ranges of bagpipes and plastic blowpipes using a 30TPI thread. This allows the piper to practice at length without becoming winded, or young players to practice blowing before moving on to a regular bagpipe chanter and reed.