Rubber ring - White 5/16 inch ID

PRW® brand white rubber O-ring. The most common bumper size, used on all plastic posts by
all manufacturers.

Inner diameter is .31 inches (7.9mm) and the cross sectional
diameter is standard 3/16 inch (4.7mm).

Why PRW® rubber?

PRW® rubber is the industry standard elastomer for playfield bumper durability, rebound response, and aesthetics.

Years of pinball playfield mechanical and chemical engineering experience have created this unique elastomer compound that combines NBR (nitrile butadene), SBR (styrene butadene), and pure latex for a rugged, attractive bumper that combines long life and better bounce.

Reference:

• Allied Leisure 264-8-100
  
• Alvin G RBR-025
  
• Bally R-243
  
• Chicago Coin 6060
  
• Marco 38-0516
  
• Midway 0017-00041-0637, 17-41-637
  
• Game Plan 08-30004N
  
• Gottlieb A-10217
  
• Sentinel 644031-2
  
• Sega/Stern/Data East 545-5025-02
  
• Stern S.E.I. 7A-120-031, 7A-135
  
• Stern S.P.I. 545-5348-52 
  
• Valley 66-380-002
  
• Williams 23-6300
  
• Wico 19-008100
  
• Zaccaria A4246