This is for one (1) quality stainless steel (AISI 304) Pulley Block 1" Type F. Each block is stamped 304 and the imperial size 1". These Type F pulley blocks feature a single nylon sheave (the wheel) housed in a bracket or eye made of durable 304 stainless steel. The nylon sheave provides a low friction, high wear resistance, and lightweight operation. Type F pulley blocks are typically used for redirecting light lines, ropes, or small wire cables. Not to be used for overhead lifting. AISI 304 stainless is a standard grade of stainless. Breaking load 770lbs.