SD12X18X3 A Double Lip Polyurethane Needle Roller Seal 12x18x3mm

INA

SD12X18X3

Lip Seal; 12 MM Shaft Dia; 18 MM Housing Bore; 3 MM Nominal Width; Polyurethane Lip; Solid Seal; 3 MM Actual Width; Not Spring Loaded; 2 Sealing Lips; No Lip Retainer; Polyamide Case; SD Seal Design Code
G12x18x3 INA Needle Bearing Seal 12x18x3 Type G - Low Cross Section

Low cross section radial shaft seals are specifically designed to fit needle bearing applications. These seals are designed without garter springs and are available in two designs:

G design with a single lip - NBR rubber reinforced with sheet steel
SD design with a double lip - Polyurethane lips reinforced with polyamide