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The Sundström SR221 prefilter is an essential part of filter use

Always keep a clean pre-filter fitted to your main filter, and you can be sure of longer filter life. Superb low-cost protection against liquid splashes and coarse particles before they reach the main filter. Use a pre-filter at all times. Great effect at a tiny cost. It’s the smartest thing you can do.

• Snap-on design
• Catches coarse particles
• Prolongs main filter life
• Costs only cents
• Great splash protection
• Smartest accessory of all