PCGA-XR1 3003 Aluminum Honeycomb PCGA-XR1 3003 commercial grade aluminum honeycomb is a lightweight core material offering excellent strength and corrosion resistance for industrial applications at low cost. PCGA-XR1 3003 honeycomb is made from 3003 aluminum alloy foil. PAMG-XR1 5052 Aluminum Honeycomb PAMG-XR1 5052 aerospace grade aluminum honeycomb is a lightweight core material which offers superior strength and corrosion resistance over commercial grade aluminum honeycomb. PAMG-XR1 5052 honeycomb is made from 5052 aluminum alloy foil and meets all the requirements of MIL-C-7438. PAMG-XR1 5056 Aluminum Honeycomb PAMG-XR1 5056 aerospace grade aluminum honeycomb is a lightweight core material which offers superior strength and corrosion resistance over 5052 and 3003 aluminum honeycomb. PAMG-XR1 5056 honeycomb is made from 5056 aluminum alloy foil and meets all the requirements of MIL-C-7438.