No need to replace this seal every time your cap is removed. MADE IN USA
If the gap at the front rail's height measures .250 or less, simply use a single high-quality EPDM rubber truck cap seal from ESI (refer to the Product Description).
If height of front rail gap is from .488 to 1" install Front Rail Seal XL (ASIN: B00IUY069S)
An ESI original design Front Rail Seal is preferred by professional installers over PVC/foam seals
Fills the front rail gap, when mounting a truck cap that has a height gap from .251 to .487.