Yenziwe ngezinto ezithambile (i-PP copolymer) lokhu kuyenza icishe inganqamuki.Ngisho nasebusika obubandayo impahla ihlala iqinile futhi iguquguquka.Lesi siphakeli sinokuvalwa kwesnap okuphumelelayo okulula ukukukhiya ukuvikela ukuchitheka kwengozi.
1. Ngaphezulu kwesiphakeli kunezimbobo zokuphakela ezinobukhulu obuyi-16 kanye nama-ridge aklanyelwe ngqo amatshwele azondle kuwo.Kulula ukuvula nokuvala.
2. Umkhombe wokuphakela izinkukhu namajuba.Izimbobo zokugwema ukumosha.Ingasetshenziswa njengesiphakeli noma njengesiphuzo sezandla.