Home → Tank Trailer Products → Gaskets → Flange Gaskets → TTMA → Drain Sump → PTFE Envelope → V-type PTFE Envelope → TTMA Sump Gasket - 4" - V-Type PTFE Envelope w/ White Non-Asbestos Filler - 1/8" Thick White N/A (10100E) (20/Pack)