30Pcs Piezoelectric Speaker 51x20mm Tweeter Set DIY Loudspeaker Portable Cases 35mm length is from outside

35mm length is from outside edge to outside

and it fits perfectly with the rim

Light weight and wearable to use makes it suitable for all kinds of needs

Make a beautiful and smooth gap for your home

ECC83 12AX7/7025 Vacuum Tube Value Tube

30Pcs Piezoelectric Speaker 51x20mm Tweeter Set DIY Loudspeaker Portable Cases 35mm length is from outsideITEM NAME: 30Pcs Piezoelectric Speaker 51x20mm Tweeter Set DIY Loudspeaker Portable img *{margin: 0; padding: 0;. 51mm Waterproof Piezoelectric Ultrasonic Speaker. Poduct: Piezoelectric Ultrasonic Speaker. 30 Pieces Piezoelectric Ultrasonic Speakers. Can be used in repellers, bird repellers, dog training devices, etc.