Rectorseal Fix-It-Foot RMB16L Low Profile Rubber Riser, supports up to 220 lbs., 16" L

This thing rocks. Certainly if you're mounting an outdoor AC unit on a deck this is a must. It's built from composite rubber material much like traffic control candle bases. It absorbs vibration and dampens sound. It also looks real nice. The connection channel is unistrut and if I'd known that before I placed my order I'd had a chance to get some unistrut nuts located. Home Depot sells them as Super Strut nuts available in 3/8". You just have to get the right size bolts that don't protrude down into the channel excessively. It's also just the right size for most mini slit outdoor units so you won't trip when working around it.

This thing rocks. Certainly if you're mounting an outdoor AC unit on a deck this is a must. It's built from composite rubber material much like traffic control candle bases. It absorbs vibration and dampens sound. It also looks real nice. The connection channel is unistrut and if I'd known that before I placed my order I'd had a chance to get some unistrut nuts located. Home Depot sells them as Super Strut nuts available in 3/8". You just have to get the right size bolts that don't... more