These are the original rescue cans developed by Bob Burnside, the L.A. county chief over 30 years ago. Compare our high quality cans before purchasing weaker imitations. We use only the strongest cross-linked polyethylene the competition doesn't. Molded, pebble-grained hand grips to reduce slippage. Our cans have the thickest walls for strength, a heavy duty 2" nylon strap and 10' of 11/32" line. The 28" rescue can is for single victim rescue and the 34" rescue can is for multi victim rescue.