Product details:

Indoor Load Centers are easy to install and feature a white enclosure for a modern, appealing unit. All hot and neutral wires terminate at custom lugs in the panel, not at the circuit breaker, so the entire panel can be wired at rough-in without circuit breakers installed. Leaving the option of having the circuit breakers easily plugged-on at final installation. An optional observation window in the cover allows at-a-glance operating status of all the circuit breakers (sold separately).