The CXY4000 Compact XY Stereo Holder allows mounting DPA Pencil Microphones with MMP-ER/ES or MMP-GR/GS preamplifiers in  a coincident XY stereo configuration. 

Two hooks in the middle of the stereo holder are for XY stereo

This lightweight holder is a convenient and practical tool for mounting Pencil Microphones on a single microphone stand so they take up very little space.

The holder is made of black anodized aluminum and ethyl propylene rubber rings to ensure durability and stability. For flexibility, the holder also includes a thread adapter for attachment to most common microphone stands.

In order to receive an authentic reproduction of the total sound field (direct and ambient sound elements) it is extremely important to use microphones that have a linear and clean off-axis response. Likewise, it is critical to use two microphones that are, within a narrow tolerance, identical in frequency response and sensitivity. 
The CXY4000 Compact XY Holder is unfortunately not compatible with DPA 4017 Shotgun Microphone.