This is the LiPoSack Battery Sack from Woodworks LLC. Constructed of woven fiberglass, this sack is used by R/C pilots and racers to contain any possible explosions from LiPo batteries involved in a crash or during charging or discharging 2" (51mm) wide hook and loop material with vent on both sides of top seams for charge leads Holds up to six cells total Fits into any field box or pit box LiPoSack from Woodworks LLC with instruction sheet Placing battery to be charged toward bottom of bag, routing charge leads through vent at top seam and pressing hook and loop material fully closed Size: 9 x 12" (229 x 305mm) Weight: 4oz (113g) Charge batteries in a safe area away from flammable materials and only on a non-flammable surface in a vented area. Do not discharge batteries below 3V per cell. Doing so may result in cell damage and subsequent cell venting on future charging Do not recharge damaged batteries. Dispose of damaged batteries in the proper manner. It is modeler's sole responsibility to assure their charger is working correctly. Always monitor charging process. Failure to do so may result in cell damage or fire. In the event of a crash, remove battery from model for observation and place in a safe open area away from flammable materials. jxs 7/23/07 ir/jxs &