K en yan ▁people ▁of ▁British ▁descent ▁Category : K en yan ▁people ▁of ▁Polish ▁descent ▁Category : Al umn i ▁of ▁the ▁By am ▁Shaw ▁School ▁of ▁Art ▁Category : K en yan ▁em igr ants ▁to ▁the ▁United ▁States <0x0A> </s> ▁Fir est op ▁pill ows ▁are ▁pass ive ▁fire ▁protection ▁items , ▁used ▁for ▁fir esto pping ▁holes ▁in ▁wall ▁or ▁floor ▁assemb lies ▁required ▁to ▁have ▁a ▁fire - res istance ▁rating . ▁The ▁products ▁must ▁be ▁used ▁in ▁accord ance ▁with ▁a ▁valid ▁cert ification ▁listing , ▁subject ▁to ▁listing ▁and ▁appro val ▁use ▁and ▁comp liance . ▁ ▁General ▁use ▁ ▁Fir est op ▁pill ows ▁are ▁used ▁in ▁open ings ▁that ▁require ▁frequent ▁access ▁( e . g ., ▁cable ▁changes ), ▁requiring ▁the ▁removal ▁of ▁the ▁fir esto pping ▁and ▁res e aling ▁after ▁the ▁changes ▁are ▁completed . ▁ ▁Techn ical ▁issues ▁and ▁common ▁mis con ception s ▁ ▁There ▁are ▁three ▁types ▁of ▁fir est op ▁pill ows : ▁ ▁rock wo ol ▁batt s ▁with ▁int umes cent ▁res in ▁inside ▁pl astic ▁b ags ▁ ▁verm icul ite ▁with ▁int umes cent ▁graph ite ▁inside ▁of ▁fib reg lass ▁b ags ▁ ▁int umes cent ▁fo am ▁rub ber ▁ ▁A ▁h ose - stream ▁test , ▁which ▁is ▁mand atory ▁for ▁fir est ops ▁in ▁the ▁United ▁States ▁and ▁often ▁used ▁in ▁Canada , ▁qual ifies ▁the ▁open ings ▁and ▁fir est op ▁pill ow ▁combinations ▁as ▁effective ▁against ▁the