Licensed cosmetologists and hairstylists performing traditional cold (chemical) perm services for clients who want a firm, well-defined small curl that's noticeably tighter than a body-wave but not an extreme corkscrew. A professional salon tool, not a standalone consumer product — it must be used with a separate professional waving lotion/neutralizer system.

Grey functions as the versatile middle ground in a color-coded rod set — used when a client wants a defined, firm curl without going to the tightest corkscrew sizes, giving stylists a repeatable, predictable result for classic perm styling.

Section clean, towel-dried hair into subsections proportioned to the rod's diameter.

Wrap an end paper around the ends of the section, then roll the hair evenly from ends toward the scalp onto the rod, keeping consistent tension across the section.

Fasten the rod with its own band and continue across the head in the stylist's chosen wrapping pattern.

Apply the perm's waving lotion following that product's directions, process for the stated time, rinse with the rods left in place, then apply neutralizer before the final rinse and unwind.

Pros

• Mid-range diameter gives a versatile, commonly requested curl size for classic perm results
• Vented, grooved barrel promotes even lotion saturation during processing
• Reusable plastic construction for repeated salon use
• Color-coding (grey) lets stylists identify the correct diameter at a glance within a mixed rod set

Cons

• Not the right choice for clients wanting the tightest ringlet curl (yellow, blue, or pink rods) or a loose body wave (white or jumbo rods)
• Has no curling effect on its own; requires a compatible professional perm waving lotion and neutralizer, sold separately
• As with any rod-based wrap, uneven wrap tension across sections can produce inconsistent curl results section-to-section