The RAM® Diamond Spacer with 2-Hole AMPS Pattern and Mounting Hardware (RAP-SPACER-238-NISU) is a custom spacer that perfectly aligns with RAM® diamond ball bases. Whether you're flush mounting and require space behind the mount or require additional clearance in your DIY mount builder, the 4mm spacer is an ideal addition to get that necessary clearance. This spacer is required when building GDS Uni-Conn kits with bracket adapters for speakers and microphones.