Comparison : Item # 14G01B13F0GC, 2 Unit Closed Nipples
Item # 14G11B13F0GC, 2 Unit Closed Nipples
Item # 15G12A13A2ND, 2 Unit Closed Nipples
Item # 15G22A13A2ND, 2 Unit Closed Nipples
Item # 16G12A13A2BC, 2 Unit Closed Nipples