311 Curb Box Overview Product Description CLICK BELOW FOR PRODUCT DETAILS 311 spec See also different: 311 ENLARGED ARCH CURB BOXES 311 ENLARGED ARCH STYLE CURB BOX. ADDITIONAL INFORMATION AND LINKS BELOW. 311 SA CURB BOXES 311 SA CURB BOXES ARE MADE OF HIGH GRADE ABS WITH A CAST IRON COLLAR AND LID WITH A BRASS BOLT LOCKING IT TOGETHER 311 Curb Box Extension << return to products