Adapter flange 1" +1/2" for 2" compression drivers

Adapter flange 1" +1/2" for 2" compression drivers This adapter allows 1" and 1/2" measurement microphones to be attached to compression drivers This set consists of the plastic flange and a 1/2" to 1" metal adapter Hole spacing 71.5mm diameter suitable for M6 screws Inner diameter for 1" adapter. 1" and especially 1/2" measuring microphones can be inserted   This adapter fits perfectly to the BMS 4590 driver. We can also manufacture this adapter exactly to customer dimensions This set contains the plastic flange and the metal adapter. Screws or the speaker are not included