... -way degassing valve (PBI, WIPF brand...)6)style:stand up with resealable zipper, quad-sealed, back center sealed, back corner sealed ... , three-side sealed...7)Finishing: full glossy, full matte, or part glossy ... requirements.7. The bag style can be three-side sealed, stand up with zipper, side gusset, quad-sealed etc., just according to your ...