Tyvek envelopes provide superior puncture tear and moisture protection. 12 X 15 1 2 black tyvek envelopes. Tyvek envelopes provide superior puncture tear and moisture protection. Colorful envelopes make your mailing stand out. Constructed from 14 lb. Olefin. Ten times stronger than paper envelopes. Feature self-seal closure. Tyvek envelopes useful for shipping flat items such as documents or catalogs. Black tyvek constructed from 14 lb. Olefin. 12 X 15 1 2 . Features a self-seal closure strip. 100 Envelopes per case. Colorful envelopes make your mailing stand out. Ten times stronger than paper envelopes. Sold as 100 per case. Brand: B O X MANAGEMENT INC. Size: [12 x 15 ]
