GSH #15W vs #30W Blade: Fine or Ultra-Fine Finish?
By groomersupplyhouse.com — Groomer Supply House | Published: 2026-11-04
Category: Srovnání
Compare the GSH #15W and #30W clipper blades on cut length, coat suitability, and trade-offs to pick the right finish for your grooming routine.
Quick answer
Choose the GSH #15W for a fine finish that leaves a bit more coverage on sensitive or mat-prone coats, and the GSH #30W for an ultra-fine, close finish on healthy skin where you need maximum visibility. Both are wide blades, but the #30W cuts to 0.5 mm versus 1.0 mm on the #15W, so the decision comes down to how close you need to get and how much skin you want to expose.
Cut length difference and its practical effect
The #15W removes hair to 1.0 mm, while the #30W goes down to 0.5 mm. That half-millimeter gap matters most on uneven coats: the #15W leaves a thin cushion that can hide minor skin irregularities, whereas the #30W reveals the skin surface more clearly, which is helpful for checking for irritation or lumps but leaves less margin for error.
On dogs with sensitive or thin skin, the extra coverage from the #15W can reduce the chance of clipper burn during longer sessions. The #30W's closer cut demands a lighter touch and more frequent blade cooling, even though both blades are rated to run cool.
Wide blade compatibility and guide combs
Both blades are wide, but only the #30W is explicitly listed as fitting wide guide combs. If you rely on snap-on combs to vary length, the #30W gives you that flexibility; the #15W's compatibility with wide combs is not stated in the catalog, so treat it as a dedicated finishing blade unless you confirm otherwise with the manufacturer.
This distinction affects workflow: groomers who use combs for length variation may find the #30W more versatile, while those who prefer direct blade work will see little difference in daily use.
Coat types and when each blade shines
The #15W suits coats that need a neat, close finish without exposing too much skin—think terriers, poodles, and mixed breeds where you want a smooth silhouette but some protection. It also works well as a final pass on body areas that are prone to irritation.
The #30W is better for clean face, feet, and sanitary areas on healthy-skinned dogs, or for breeds where an ultra-close finish is standard, such as schnauzers and some spaniels. On dogs with very sensitive skin or known clipper sensitivity, the #30W may be too aggressive for extended use.
Key trade-offs
- Closeness vs. skin protection: The #30W cuts closer (0.5 mm) for a cleaner finish but leaves less margin for error on sensitive or uneven skin. The #15W (1.0 mm) offers a thin buffer that can reduce irritation risk. If your dog has sensitive skin or you’re grooming a wiggly pet, start with the #15W.
- Guide comb flexibility: The #30W fits wide guide combs, so you can snap on a comb for longer lengths. The #15W’s wide comb compatibility is not specified, so plan to use it as a direct finishing blade. If you rely on combs for length variation, the #30W is the more versatile choice.
- Coat type suitability: The #15W works well for terriers, poodles, and mixed breeds needing a neat but not overly exposed finish. The #30W suits clean face/feet/sanitary trims on healthy-skinned breeds like schnauzers. Match the blade to the coat and skin condition, not just the breed standard.
Product facts
- GSH #15W: Cut length 3/64 in or 1.0 mm; high-carbon steel with chrome coating, heat-treated and ice-tempered; Rockwell hardness 62°; runs cool. The 1.0 mm cut leaves a thin layer of coat, which can be more forgiving on sensitive skin and reduces the risk of nicks during longer grooming sessions.
GSH #15W - GSH #30W: Cut length 1/50 in or 0.5 mm; fits wide guide combs; high-carbon steel with chrome coating, heat-treated and ice-tempered; Rockwell hardness 62°; runs cool. The 0.5 mm cut delivers an ultra-fine finish, and wide guide comb compatibility lets you adjust length without switching blades, though the closer cut exposes more skin.
GSH #30W
Which blade is right for you?
Best for
- Groomers working on sensitive or thin-skinned dogs who want a close but forgiving finish
- Terriers, poodles, and mixed breeds needing a smooth body clip with some coat coverage
- Professionals who prefer a dedicated finishing blade without guide combs
Not for
- Groomers who need the closest possible cut for clean face, feet, or sanitary areas on healthy skin
- Those who rely on wide guide combs for length variation
- Dogs with very sensitive skin where an ultra-fine cut could cause irritation
