SIMBOX 63 intermediate frame 1-R for 70mm devices in N-distributor ALPHA SIMBOX small distributor - optimal down to the last detail. The ALPHA SIMBOX small distributors are designed for optimal use of space even in tight spaces. 1. The ALPHA SIMBOX XL offers generously dimensioned wiring spaces. 2. The small distributors are characterized by an extensive accessory package that is compatible with the flush-mounted distributor/hollow-wall distributor (terminals, cover strips, door lock).