Flight case panels made of Foamlite®

ProX Universal Dual ATA-Style Speaker Flight Case for 15 Speakers (Black), flight case

Heavy Duty Flight Cases Interior in aluminium, foam and plywood

ProX XS-2X12-SPW Universal 12-Inch Dual Speaker Flight Case - Sound Productions, flight case

ProX XS-2X12-SPW Universal 12-Inch Dual Speaker Flight Case - Sound Productions, flight case

Polytcase® flight-case - JPemBall

Foamlite® - lightweight board - lightweight plastic sheet

Penn UltraFlite Panels make it ROCK! — TPi

CASE WALL MATERIALS - Composite Panels - DIY Road Cases Store

7mm Matte Textured PP Honeycomb Panel for Flight Case - POLYFAVO

Foamlite® P Polypropylene

ProX XS-2X12-SPW Universal 12-Inch Dual Speaker Flight Case - Sound Productions, flight case

ProX XS-2X12-SPW Universal 12-Inch Dual Speaker Flight Case - Sound Productions, flight case

7mm Matte Textured PP Honeycomb Panel for Flight Case - POLYFAVO

OSP PAR-CASE-8C ATA Universal Flight Case for 8 LED PAR CANS, Upgraded with Casters & Caster Cups