Solid doors have superior insulation to the Glass Door, as well as protection to UV exposure if you have beer bottles / beer lines in direct/indirect sunlight.

Fits both:
KL32605 Grand Deluxe 3 - Stainless Steel Two Door Kegerator
KL32612 Grand Deluxe 3 - Stainless Steel Three Door Kegerator

This door is for the far right or middle (depending on model) door only.