Cosmo Prof in Grantville is San Diego's licensed-cosmetologist-only beauty supply warehouse at 4560 Alvarado Canyon Road, stocking more than 25,000 SKUs across hair color, styling tools, barber supplies, skin care lines, and nail products in the 92120 ZIP. The store operates as CosmoProf location #8870 in a national chain of over 1,200 outlets, but this Grantville branch anchors the Alvarado Canyon commercial corridor for salon owners and cosmetologists restocking between client appointments. Proof of a current California Board of Barbering and Cosmetology license is required at checkout, keeping the inventory limited to salon-grade formulations unavailable at retail drugstores. Hair color inventory spans permanent, demi-permanent, and semi-permanent lines from manufacturers whose formulations stock chairs at salons throughout the Grantville corridor, including Salon Sagrado on Mission Gorge Road. Barber equipment includes Andis, Wahl, and BabylissPRO clippers alongside straight-razor kits and hot-lather machines. Salon furniture from Pibbs, Collins, Belvedere, and PureSana is available for in-store ordering, covering hydraulic chairs, shampoo stations, and reception seating. The skin and body care aisle carries waxing supplies, facial treatment kits, and massage oils calibrated for spa and esthetics licensees. In-store education events run through manufacturer partnerships, offering hands-on technique training approved for California continuing-education credits. Barber supply restocking runs through the same counter — clippers, guards, blade wash, and styling products — and fading-focused shops on the corridor, including GQ Barber on Alvarado Canyon Road, restock consumables between vendor delivery cycles. Curbside pickup, same-day delivery, and in-store shopping serve the broader Grantville, Allied Gardens, and Del Cerro salon community east of the I-8 corridor.