Silicone bag:Silicone bag is also called vacuum bag. Made of silicone rubber material, it is highly essential?in glass lamination, help to pump out the air between glass and EVA film, will fix the two?glass on the right position to avoid the error. Besides, after fixing the glass, it is useful for?the glue adhesion when the EVA film start to melt. It is high heat-resistance andtear-resistance . Each bag includes silicone sheet, bucle and nozzle, also the tube.Durable & Flexible Silicon BlanketsThis strong silicon pad meets the most severe industrial tests. It is made of special hightemperature resistant silicon. The material will not become brittle after numerous heatingand cooling cycles. It is resistant to high pressure forces when wrapping around glass duringvacuum.Patented Silicon Blankets Edge SealTop and bottom pad edges are specially designed, providing an airtight interlocking system.The higher the vacuum in between the top and bottom pads, the firmer the edges aresealed.Features:* It is high anti~tearing, able to bear high temperature.* It's high flexible, inertia sufferance to avoid mucosity,bear oil & aging,its soft material isbest suitable for hard glass ,ensuring glass not bent and break in high temperature .* Connecting vacuum pump, pump out the air and keep air pressure well in lamination.?A whole set includes the nozzle, tube, silicone sheet, Sealing strips .* At least 5 years service time .? http://www.huichipdlc.com/accessories-for-eva-glass-lamination/vacuum-bag.html