StandOff Barrels provide spacing to create single or multiple layers. Gyford StandOff Systems® offer Standard Aluminum Barrels and #316 Stainless Steel Barrels. Round Aluminum Barrels are available in 8 diameters and lengths ranging from 1/4" up to 12” long. Stainless Steel Barrels are available in four diameters and are durable for outdoor use.