C.R. LAURENCE CAP1BS CRL 316 Brushed Stainless Cap Assembly for 1" Diameter Standoffs. CRL 1" Standoff Cap Assemblies are designed to be used with CRL"s 1" (25 mm) Standoff Bases to create displays, furniture or signage. Cap Assemblies are easily installed using our Cat. No. S0W Standoff Wrench..