Berliss BSP-1654 - Mechanical Seal Assembly, Type 1 Standard, 1-7/8 in Inside Dia, 2-1/2 in OD Seal Head, 2-5/8 in OD M Berliss Berliss&Trade; BSP-1654 UPC: | UNSPSC: 40151700 | GTIN: Gaskets & Packing > Shaft Sealing Devices > Pump Seals Berliss™ Mechanical Seal Assembly, Type 1 Standard, 1-7/8 in Inside Dia, 2-1/2 in OD Seal Head, 2-5/8 in OD Mating Ring, 1/2 in THK Mating Ring, Buna-N Elastomer, Carbon Primary Ring, Stainless Steel Metal Parts, Ceramic Mating Ring, 304/316 Stainless Steel Spring, 200 deg F, 230 psi