Here's what other sites are saying:
On Sale. Petzl Looping Etrier (Fall 2007) ALL CLIMBING SALES ARE FINAL. The Looping Etrier by Petzl is a 4-step etrier for aid climbing. Weight: 145 g Features: 4 steps. Wide, stiffened webbing reinforced to protect against wear. Can be clipped directly to the anchor or on the FIFI hook.
Petzl Gradistep Etrier
Black Diamond Dynex Daisy Chain
$24 - $35
Metolius Ultimate Daisy
$47 - $49
CAMP Dyneema Daisy Chain
Metolius 8 Step Ladder Aider
Metolius Personal Anchor System - P.A.S.
$30 - $39
Black Diamond Nylon Daisy Chain
Metolius Pocket Aider