This is the APC 7x6 Slo-Flyer Electric Propeller. FEATURES: Computer-optimized design gives these props a thinner profile and more "bite" with less noise Lightweight molded nylon construction reduces rotating mass for higher output and longer life Reinforcing fibers help maintain true, constant pitch at any RPM Slo-Flyer propellers work well with Electric powered Park Flyer-type aircraft INCLUDES: APC 7x6 Slo-Flyer Electric Propeller 0.236" (5.9mm) and 0.188" (4.8mm) locating rings Instruction sheet REQUIRES: ALL props require balancing (use TOPQ5700) May need prop reamer, use GPMQ5005 (SAE) or GPMQ5007 (Metric) SPECS: Length: 7" Pitch: 6 COMMENTS: Slo-Flyer props cannot be used on glow engines jxs 12/12/06 ir/jxs