Product Name: Gas Sampling Bags 3 Litre PVDF Film Model NO.: ES-3L-PF62P Type: Gas Sampling Bags Application: School, Lab Material: PVDF Structure: Gas Bags Customized: Non-Customized 3L: 22*32 Cm Trademark: E-Switch Transport Package: Paper Box Specification: 3L Origin: Made in China HS Code: 39232900 Product Description Gas Sampling Bags ( pvdf film )capacity:3LValve:polypropylenebag film: PVDFvalve number:twosmall paper box:53*34*17CMone box with 60pcs,3L pvf gas sample bags.bigger paper box:53*35*32 CMone box with 120pcs ,3L pvdf gas sample bagsuint price:7.5USD,FOB shanghai .Band:E-Switch, easy to use valve.Made in china ,manufacture Shanghai Sunrise Instrument Co.,Ltd.Good quality, low price!we offer sizes from 5M L to 5L.Available with polypropylene (we get patent) or PTFE valve;choose bags with a septum fitting for syringe sampling or standard spiking.Maximum operating temperature: 100 °C with polypropylene valvesSampling bags are low-cost, whole-air sampling devices for VOCs and permanent gases. Several EPA, NIOSH, and OSHA methods exist for bag sampling for a variety of applications: stationary sources emissions; workplace atmospheres; ambient, indoor air quality; and breath analysis. Choose the valve type appropriate for your application. A single eyelet provides handling convenience.