Joyin Replacement Bulbs for 10 Handmade Clear Glass ST40 Edison Style String Lights, E17 brass base(10 Pack) 120V,7W incandescent bulbs, Great Replacement Bulbs For ST40 Edison String lights. Bulb size: E17 brass base - fits into a standard C9 light socket, Bulb shape: ST40. UL listed for Indoor and Outdoor Uses. Clear glass bulbs cast a warm white glow, Perfect for any antique dcor. We offer 1-Year quality guarantee. For the string lights, please search ASIN B011BUDYU0