SME Stock Riser With Shell Loop Black Neoprene. It features built-in swivel stud access for sling attachment and shell loops. Includes five (5) foam inserts of various thickness for desired comfort: 1/8" 1/4" 3/8" 1/2" 5/8". Specifications for SME Stock Neoprene Risers w/ Shell Loop: Manufacturer: SME Color: Black Fabric/Material: Neoprene Package Contents: SME SME-RSRSL Stock Riser With Shell Loop Black Neoprene SME Stock Riser With Shell Loop Black Neoprene SME-RSRSL