Streamline HOSE REEL HRM4-GP popular with water fed pole systems.
Garmin Hrm Pro Tri Heart Rate Strap Run 4.0 Swimming Running Hrm-dual Ant+ Bluetooth Bike Bicycle Cycling Computer Gps Hrm4-run - Bicycle Computer - AliExpress
Streamline HOSE REEL HRM4-SS top quality cleaning accessory.
1pcs New Relay HKE HRM4-S-DC24V | eBay
Output Elbow & Flynut for HRM4 & 5 Hose Reels - Cleaning Products UK