4712 Pneumatic Tube Carrier is for use in 4"x7" point-to-point pneumatic systems. This unique side-opening carrier with its touch transparent top is easily loaded with large or bulky items. The black impact-resistive body makes the 4712 an ideal replacement carrier for aluminum, severe-service, or other heavy-load carriers. Closed with a spring loaded plastic catch. The gray felt bumpers can be color coded with color strips. A one piece ½” foam liner is now available for the model 4712. This versatile liner is designed to adjust to the contour of the carrier. It provides protection for items of all shapes and sizes. The approximate dimensions at the largest points of the carrier are 3 ¾”H X 6 ¾” W X 14 ¼” L.