Part# 617-925-175-SC. Piston Wear Rings. SEAL INFORMATION: MATERIAL: NYLON, TEMP: -40? to +230?F, SPEED: 1.5 FT/SEC. PRODUCT DETAILS: Nom. ID: 9, Nom. OD: 9-1/4, Nom. Ht: 1.735, Style: 614 NYLON ROD BEARINGS, Brand: Hercules.