Universal Black Temperature Sensor Housing designed for thru-wall installation with 3/8" sensing bulb compatibility. This thermowell works with temperature sensors from Balboa, Gecko, Hydro Quip, and other major spa control manufacturers. Requires 1" mounting hole for installation.
| Thermowell Type | Thru-Wall |
| Sensing Bulb Size | 3/8" |
| Thru-Wall Hole Size | 1" |