Black Silicone Hose, 3 3/4 x 3 1/2 inch ID Straight Reducer

This black silicone reducer is just the right piece to reduce your 3 3/4" nipple to a 3 1/2" pipe.

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HPS For 3 Length Silicone Straight Reducer Coupler Hose 89mm - 102mm ID Black

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Black ID 2.5 to 4 inch 63-102mm Straight Silicone Reducer Turbo Coupler Hose

Black 3 inch ID:76mm Straight Silicone Hose Coupler Turbo Intercooler Pipe : สำนักงานสิทธิประโยชน์ มหาวิทยาลัยรังสิต