The hole spaces have been set to take commonly seen ph/ORP/Conductivity probes e.g Neptune Systems. No screws required which allows for faster cleaning.
This rack requires two M-Rack magnet PUKs - Sold separately. https://charterhouse-aquatics.com/shop/aquatics/accessories/m-rack-modular-system/itc-aquatics-m-rac...
The end result is an ultra slim 5mm thick probe rack in your sump - taking up less viewing space when viewed from the side!
Made in the UK by ITC Reefculture.
This is not a 3D printed part.
Dimensions:170mm x 40mm