APEXI TAIL SAILENCER Ï_115 155-A007Brand APEXI Product Number 155 A007 Product Description ___ correspond to the apex muffler of the tail outside diameter _115 _90 _75. (Except PSrevolution, the falcon) Or the following conditions at the apex muffler is only if you can be ensured. 155 A 007: tail inside diameter _ 110, depth straight 30 mm or more 155 A 008: tail inside diameter _ 87, depth straight 30 mm or more 155 A 009: tail inside diameter _ 71, depth straight 30 mm or more ___