LIKE ALL ENPAC® OVERPACKS THE ENVIROSALV POLY-SALVAGE DRUM PLUS ALLOWS FOR SAFE AND SECURE SHIPMENTS OF HAZARDOUS MATERIALS; HOWEVER ITS GROUND-BREAKING TECHNOLOGY IS LOADED WITH EXTRA FEATURES THE LOCKABLE STACKABLE ENVIROSALV SALVAGE DRUM PLUS IS BUILT STRONGER AND SEALS TIGHTER FOR ADDED STRENGTH SECURITY AND CONVENIENCE LIMITED 1 YEAR WARRANTY. UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" DESIGNED FOR LEAKING DRUMS UP TO 55 GALLONS. NEWLY DESIGNED CASTELLATIONS ALLOW FOR EASY TWIST-DOWN CLOSING USING AVAILABLE SUBSTRATE OR 2X4"" STANDING ON ITS SIDE OR LAYING FLAT. 4-POINT LOCKING SYSTEM PROVIDES ADDED SECURITY BY ""LOCKING"" STACKED SALVAGE DRUMS. LOCK DOWN KIT (1295-LK) IS AVAILABLE AS AN OPTIONAL - LOCKABLE SERIALIZED IDENTIFICATION SECURITY SYSTEM WHEN ACCOUNTABILITY MATTERS MOST. LOCK DOWN KIT ADDS AN IDENTIFICATION FEATURE TO ACCOUNT FOR HAZARDOUS MATERIAL FROM POINTS A TO Z. ENGINEERED SHOULDER DESIGN ALLOWS WORKERS AND MATERIAL HANDLING EQUIPMENT TO MOVE DRUMS WITH EASE. X-BASE TECHNOLOGY ALLOWS FOR EASIER CLOSURE WITH 2X4"" OR AN AVAILABLE SUBSTRATE. UN CERTIFIED AND DOT APPROVED. US PATENT NO. 0288667