powerdayNeck Strap + Neck strap Balancer + Transmitter Bracket Holder for JR FUTABA FS-TH9X-B TX Designed for Futaba /JR / Radiolink / Walkrea / Flysky / Esky / WFLY ect. transmitter. Made of aluminum alloy , Color : Black Holder size: -length:138mm ,-wide:77mm ,-weight:65g ,-Hole diameter:5mm the Neck strap Balancer: connection mouth wide 3mm Please note the Neck strap Balancer's connection mouth is fit your transmitter before buy it.