Silca Elastomer Seal for Presta Chuck #242 PU5653

Replacement elastomer gaskets for old or new SILCA pumps that offer a longer life expectancy than traditional rubber.

• New Two-Stage sealing geometry optimized for all Presta valve stems
• Pressure amplifying dome geometry uses air pressure to clamp valve stem
• New Two-Stage sealing geometry optimized for all Presta valve stems
• Pressure amplifying dome geometry uses air pressure to clamp valve stem
• Fits all SILCA Presta heads
• Made in USA
• Utilizes a high-tech, fully synthetic elastomer base material
• Features five times the durability of traditional rubber materials