Polypropylene fitting for polyethylene pipe. No. 350175: 3/4" insert x 1/2" insert No. 350117: 1" insert x 3/4" insert No. 350140: 1-1/4" insert x 1" insert No. 350154: 1-1/2" insert x 1-1/4" insert No. 350121: 2" insert x 1-1/2" insert