ALUMINUM:

Aluminum Alloy: 1100, 3003, 5005, 5052.
Thickness: 0.008 in., 0.012 in., 0.016 in., 0.020 in., 0.025 in., 0.032 in., 0.040 in., 0.050 in., 0.063 in., 0.080 in., 0.090 in., 0.125 in.
Aluminum material is most popular, can do stamped tags/labels, debossed/embossed/ etched name plate, printed nameplate etc..

STAINLESS STEEL:

Alloy: 304, 316, 321, 410, 430.
Thickness: 0.016 in., 0.018 in.|0.024 in., 0.030 in., 0.036 in., 0.048 in., 0.060 in., 0.075 in.
Stainless Steel looks more high-end than aluminum, and harder, can do laser engraving, acid-etching, various printing, etc.

BRASS:

Alloy: 70/30 (260), 85/15 (230)
Thickness: 0.016 in., 0.020 in., 0.032 in., 0.040 in., 0.050 in., 0.063 in., 0.093 in., 0.125 in.
Brass material can do stamped label/tag, debossed nameplate, etched name plate, and can electroplating other colors.

ZINC:

Zinc Alloy Thickness: 1-2mm.
Mainly do elecformed zinc logo nameplates/badges for cloth, backpack, bag, wallet, belt etc.

Finish: Anodized (Clear & Colors), Brushed (Commercial Brushed Finish), Mill (Matt Finish), Polished (Brite Polished Finish）