Columbian CO175: Insurance Form Envelopes - Columbian CO175 ( WEVCO175 ): Insurance Form Envelopes 24-lb. white wove paper with Poly-Klear right-hand window. Gummed seal, security tint. 500 envelopes per box. [5 Boxes per carton.] #10 Size For most standard insurance forms. 1-1/8 x 4-1/2 window 1/2 from bottom, 4-1/8 from left. 4-1/8 x 9-1/2
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