Syringe Filters, Acrodisc with 13mM Ghp Mem. $1,960.26. GHP Discontinuation - Accessories Spare Parts - Pall Shop. Pall Laboratory GHP membrane will be discontinued November 1, 2019. Download our application note to see how our next generation universal membrane wwPTFE 4908 - Syringe Filter, Acrodisc, GHP, 25 mm, 0,20 µm - Analytics-Shop