This is an attachment with a 1/8PT hole for mounting GReddy temperature gauge and water temperature gauge sensors to the radiator upper hose. Material is Aluminum with blue alumite color. Enjoy coordinating with other GRADY products for the same color. Size Compatibility CODE Price (Tax Included) Price (Tax Excluded) 26φ For EP91 etc., 4E series, CP21V etc., F6A series, L600S engines etc. 16401626 ¥4,400 ¥4,000 28φ Exclusively for 5E, GA series engines 16401628 ¥4,400 ¥4,000 30φ For 4AG, BP/B6, B16A series engines etc. 16401630 ¥4,400 ¥4,000 32φ For 3S, H22A series engines etc. 16401632 ¥4,400 ¥4,000 34φ For SR (S14/S15), JZ, CA series engines etc. 16401634 ¥4,400 ¥4,000