Hi,I would like to know the price for GM40 diaphragm seal pressure gauge.I am interested in buying 30 Pieces.Please diaphragm seal for pressure gague. Material Teflon thickness .5mm outer circle 100mm No circles 6 hieight of curve 2mm. working pressure will be 20 psig.Thanks.M.AfzalPlease provide us with a quotation.Thank you. Show More