Snack Attack Vending LLC is offering a 16.9oz Bottle Shim for Vendo models 621, 721 & 821 soda machines. This shim is for 2 deep 16.9oz bottles. Installs in seconds by clipping on the right wall of selection column. From factory there are 2 knock outs on wall for the shim to clip in and hang. Might have to test vend rotor out of the way and pull plug to machine to get shim down past rotor. This shim is brand new (OEM).