[RDY] [送料無料] JAM Paper 6 1/2 x 9 1/2 オープンエンド封筒、白、500枚/箱 [楽天海外通販] | JAM Paper 6 1/2 x 9 1/2 Open End Commercial Envelopes with Peel and Seal Closure, White, Bulk 500/Box