| Business | Phone |
| A Ability North Coast Inc 10323 Lorain Ave, Cleveland 44111 | (216) 671-0644 |
| Allstate Glass Block Factory Cleveland 44130 | (440) 845-2383 |
| Bizik Glass Block & Fireplace 16130 Brookpark Rd, Cleveland 44135 | (216) 267-2720 |
| West Side Glass Block Inc 1300 Brookpark Rd, Cleveland 44109 | (216) 398-1020 |
| Glass Block Headquarters 27882 Lincoln Rd, Cleveland 44140 | (440) 892-8478 |
| Glass Block Works 1300 Brookpark Rd, Cleveland 44109 | (216) 741-3773 |
| Global Glass Block Co 23570 Lakeland Blvd, Cleveland 44132 | (216) 731-2333 |
| Maple Glass Block 26231 Broadway Ave, Cleveland 44146 | (440) 232-1707 |
| Metro Glass Block 11350 Brookpark Rd # 100, Cleveland 44130 | (216) 265-8500 |