D.O.T. COMPLIANT CYLINDER CARTS HOLDS D & E SIZE CYLINDERS 20" (ID) DEEPCB50-4SVCYL. CAP: MULTI 20" (ID) DEEPCB50-4SVCYL. CAP: MULTI LOCK TOP LIDNO. 6246-LTLHEAVY -DUTY D.O.T. COMPLIANT LOCK-TOP CART LOCK TOP LIDNO. 6246-LTLHEAVY -DUTY D.O.T. COMPLIANT LOCK-TOP CART LOCK TOP LIDNO. 6406-LTLHEAVY -DUTY D.O.T. COMPLIANT LOCK-TOP CARTS LOCK TOP LIDNO. 6406-LTLHEAVY -DUTY D.O.T. COMPLIANT LOCK-TOP CARTS 20" (ID) DEEPNO. CB50-SV-SDCAP: (130+) M4/M6/B 20" (ID) DEEPNO. CB50-SV-SDCAP: (130+) M4/M6/B