Square Mailing Tubes

Square Mailing Tube with built-in end caps. Made from 200-pound-test white-one-side corrugated cardboard. Ship and store flat. These one-piece mailers just fold together.  Square construction makes packing and shipping easy!
3 x 3 x 18" Square White Mailing Tube
3 x 3 x 18" Square Mailing Tube with built-in end caps.
Made from white-one-side 200-pound-test corrugated. **NEW**

Base SKU:mtsq318

3 x 3 x 25" Square White Mailing Tube
3 x 3 x 25" Square Mailing Tube with built-in end caps.
Made from white-one-side 200-pound-test corrugated cardboard.**NEW**

Base SKU:mtsq325

3 x 3 x 30" Square White Mailing Tube
3 x 3 x 30" Square Mailing Tube with built-in end caps.
Made from white-one-side 200-pound-test corrugated cardboard.**NEW**

Base SKU:mtsq330

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