CRL Aluminum U-Shape Door Bottom L 35-3/4″ – Durable Weather Seal Hardware 17VRA36 CRL Aluminum U-Shape Door Bottom L 35-3/4″ – Durable Weather Seal Hardware. Enhance your door’s weather protection with the CRL 17VRA36 35-3/4″ Aluminum U-Shape Door Bottom, designed for 1-3/4″ doors.