Protogen cheek bubbles — the round side panels that complete the look of your protogen build. Available as plain 3D printed bubbles or with custom LED-lighted electronics. Works with all ProtoFrenz, M16 Studios, and ZillionRoss head styles. Options Bubble Only — one pair of 3D printed PLA+ cheek bubble panels in your chosen head style. Swap the look of your build, keep a spare set, or paint and fur them however you like. Lighted Cheeks — cheek bubble panels plus custom LED electronics. Send us your logo or artwork after purchase and we'll cut and backlight it into a glowing PETG panel. Compatible with ProtoFrenz 3.0 controller builds. Head Style Compatibility ProtoFrenz — fits Iris, Nyx, and Cipher head bases MK2, MK3, MK5 — fits M16 Studios designs ZillionRoss — fits ZillionRoss design Bubble geometry and mounting panel differ per head style — select your head above. Lighted Cheeks — How It Works Select Lighted Cheeks and your head style, then purchase Send us your logo or artwork (PNG recommended, high contrast works best) We'll prepare the panels to match your design If purchased with a head or head base, electronics will be fully connected. If purchased standalone, electronics ship with bare tinned wire ends ready for soldering — connectors are not included. What's Included Bubble Only: One pair of 3D printed PLA+ cheek bubble panels. Lighted Cheeks: One pair of custom lighted PLA/PETG cheek panels with LED strip and bare tinned wire leads. Not Included Head base · paint · fur · connectors (lighted version only, unless ordered with head) Made to order in Portland, Oregon. Up to 3 weeks build time + shipping.