5-1/2"L X 5"H E5 Silent Flo 5000Available With Bare Wire Connection: Ai # 1-00-0222 / Mfg # 74427Replaces All Caldera Spas Circulation Pumps From 2002 - Current Specifications Category: Pumps Subcategory: Circulation Pumps 74427, E5-NCHNNNN3W-10