Product Information Seal: Buna-N Select a Product Part NumberMaterialCoupler SizeHose Shank Size 4030-C-SS316 Stainless Steel4" (100mm)3" (75mm) 3025-C-SS316 Stainless Steel3" (75mm)2-1/2" (65mm) 1510-C-SS316 Stainless Steel1-1/2" (40mm)1" (25mm) 4030-C-AL356T6 Aluminum4" (100mm)3" (75mm) 3020-C-SS316 Stainless Steel3" (75mm)2" (50mm) 2015-C-SS316 Stainless Steel2" (50mm)1-1/2" (40mm) 2015-C-AL356T6 Aluminum2" (50mm)1-1/2" (40mm) 5040-C-AL356T6 Aluminum5" (125mm)4" (100mm) 3020-C-AL356T6 Aluminum3" (75mm)2" (50mm) 3040-C-AL356T6 Aluminum3" (75mm)4" (100mm)