A polyolefin blend comprising: (a) from 30 to 80 weight % of a low molecular weight copolymer comprising from 85 to 100 weight % of ethylene and from 15 to 0 weight % of one or more C.sub.4-8 alpha olefins having a density from 0.953 to 0.965 g/cm.sup.3 and a melt flow rate (2.16 kg 190.degree. C.) from 0.1 to 20.0 g/10 minutes; and (b) from 70 to 20 weight % of a high molecular weight copolymer comprising from 85 to 99.9 weight % of ethylene and from 15 to 0.1 weight % of one or more C.sub.4-8 alpha olefins having a density from 0.915 to 0.940 g/cm.sup.3 and a melt flow rate (21.6 kg 190.degree. C.) from 0.05 to 5.0 g/10 minutes, said copolymer being prepared with a single site catalyst is useful in the preparation of pipe.

 
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