K-Packer R X L 4” Coupling – Nom. Casing Size 5-5/8” Neoprene rubber, Specify: 70 or 50 durometers Provides a 'sandtight' seal between screen and casing. Designed to seal SCH 40 pipe.oprene rubber, Specify: 70 or 50 durometers Provides a 'sandtight' seal between screen and casing. Designed to seal SCH 40 pipe.
