Max-E/Dura Impeller Lock Screw for Specified Impellers filter-internal-diameter_4 1/16 inches This is a Colorimetric Series

This is a Colorimetric Series Accuracy Check Kit for device performance verification

Argentometric

Made from 100% recycled materials

This is a Baker Hydro Lid Gasket replacement for Lid item 15B0086 (old style) for the HRV sand filters pre-1984

This is a replacement Raypak Transformer

Max-E/Dura Impeller Lock Screw for Specified Impellers filter-internal-diameter_4 1/16 inches This is a Colorimetric SeriesThis is a Pentair Impeller Screw for Max E Pro, Max E Glas II, and Dura Glas II pool pumps. This screw goes with the following impellers: C105 238PBA, C105 238PDBA, C105 238PEBA, C105 238PLA, C105 238A, C105 238PDBA, and C105 238PEBA.