Alright boaters and kayak enthusiasts, these stainless steel pulley blocks are exactly what you need for smooth sailing! Made from high-quality 316 stainless steel - that's the really corrosion-resistant type - these pulleys can handle saltwater, freshwater, whatever you throw at them. The electrolytic polishing gives them that shiny, rust-proof finish that'll last season after season. Each pulley weighs about 48g (1.7oz) and comes with high-strength nylon wheels that won't scratch up your ropes. The genius knot-proof beams underneath actually prevent your ropes from tangling during use - no more frustrating knots when you're trying to set up quickly! Perfect for kayaking, canoeing, sailing, and pretty much any water sport where you need reliable pulley action. You get two in the pack, which is great because you always need backups or multiple setup options. The stainless steel shell is seriously durable - we're talking sheet stamping construction that can take some serious abuse without bending or breaking. Whether you're rigging up your kayak, setting up boat controls, or need pulleys for other outdoor activities, these deliver professional-grade performance without the crazy price tag. The nylon sheaves rotate smoothly without that annoying squeaking sound some cheap pulleys make. Easy to install and they just work - exactly what you want from marine equipment. No more worrying about corrosion or rust eating away at your gear halfway through the season!