| Used (Like New) | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.50 | $6.44 | The MOC Shop (0) Shipping ~$5.94 Minimum Order $1.00 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.551 | $13.52 | AbsoluteBrick (232) Shipping $12.97 Minimum Order $1.30 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 2 | $0.627 | $5.62 | A Brick Hobby (18) Shipping ~$4.99 Minimum Order $3.00 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.647 | N/A | Brickshaw (50) Request a Shipping Quote Minimum Order $3.23 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 2 | $0.652 | N/A | StackIt Bricks (17) Request a Shipping Quote Minimum Order $9.06 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.661 | N/A | Brick Masterpiece (928) Request a Shipping Quote Minimum Order $1.30 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.67 | $6.67 | 808brickbuybrick (110) Shipping ~$6.00 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.685 | $17.92 | Noosa Brick Paradise (40) Shipping $17.24 | |
| Used (Good) | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.69 | $5.68 | A Brick Hobby (18) Shipping ~$4.99 Minimum Order $3.00 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 2 | $0.698 | $5.65 | Pop's Block Shop (1333) Shipping ~$4.95 Minimum Order $0.94 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 16 | $0.741 | $6.73 | BrickSick OLX / BLIK (60) Shipping $5.99 Minimum Order $2.50 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 5 | $0.765 | $5.76 | Tailored Bricks (64) Shipping ~$4.99 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 2 | $0.767 | $17.75 | Studs & Bricks (70) Shipping $16.98 Minimum Order $2.70 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | $0.778 | N/A | The Database (35) Request a Shipping Quote Minimum Order $1.99 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 11 | $0.782 | $11.56 | Brickslan (90) Shipping $10.78 Minimum Order $5.39 | |
| Used (Good) | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.80 | $5.40 | Penguins and plastic (192) Shipping $4.60 Minimum Order $7.50 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | $0.804 | $11.58 | Jsemin Bricks (18) Shipping $10.77 Minimum Order $5.39 | |
| Used (Good) | Red String with Coupling Points and End Studs 1 x 21 | 1 | $0.815 | N/A | bartbart's (298) Request a Shipping Quote | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | $0.822 | $15.92 | LLOJ Toys (88) Shipping $15.09 Minimum Order $3.23 | |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | $0.825 | $9.99 | LoTi Toys (77) Shipping $9.16 Minimum Order $5.39 | |