A Steel Collar provides a transition to the Elephant Trunk needed to control concrete placement. Each collar is formed with an upset near the opening for clamping the trunk. Elephant Trunk is typically cutto-length on the site to match concrete placement needs. Longer lengths may be needed to control wall placements, shorter lengths may be needed to control slab placements. After cutting to proper size, the trunk is attached to the Concrete Hopper funnel or Steel Collar with an Adjustable Band Clamp. The trunk and clamp are sleeved over the opening and secured to the hopper funnel or steel collar.