Comparison : Item # 9871-888, 1/2 Inch Copper Tube Size (CTS) 1 Twist-To-Lock CTS to Stem Stackable Tee
Item # 9871-12128, 3/4 Inch Copper Tube Size (CTS) 1 Twist-To-Lock CTS to Stem Stackable Tee
Item # 9871-121212, 3/4 Inch Copper Tube Size (CTS) 1 Twist-To-Lock CTS to Stem Stackable Tee