Electra Partners said Friday that it has received a $1.3 billion binding offer for Allflex Holdings. BC Partners is the buyer, Electra says. Allflex makes and distributes plastic and electronic animal identification tags. The sale will generated gross proceeds of $630.5 million for Electra Partners’ clients, including Electra Private Equity which will receive $398 million on the close of the deal. This represents a gross return of 15x original cost and an IRR of 28%. Rothschild advised Electra Partners and Allflex.