The receivers are available in M, T (e.g. for D10), and ML and TL (for horns with Lewis leadpipes like LDx5). Also in grades 1 and 1.5.
The number indicates how many millimeters the mouthpiece goes further into the leadpipe. This is to balance the width of the different mouthpieces.
The horn is usually more open when the mouthpiece goes in further.
Photos courtesy of Lynn Means at The Maker's Melody.
The receivers are available in M, T (e.g. for D10), and ML and TL (for horns with Lewis leadpipes like LDx5). Also in grades 1 and 1.5.
The number indicates how many millimeters the mouthpiece goes further into the leadpipe. This is to balance the width of the different mouthpieces.
The horn is usually more open when the mouthpiece goes in further.
Photos courtesy of Lynn Means at The Maker's Melody.