20" Banana Saddle Sparkle Purple. Bike seat, bicycle seat, Bike part, bicycle part, lowrider bike seat, lowrider bicycle seat, chopper bike seat 20" Banana Saddle Sparkle Purple. Long: 17 3/4" Width: 5" Material: Vinyl We carry over 3,000 bicycle parts and accessories. If you have any questions about any of our parts, please send us an email.