

⌚ Elevate your Seiko game with the ultimate rubber strap upgrade!
The Crafter Blue CB03 is a 20mm curved end rubber watch strap designed specifically for Seiko MarineMaster MM300 series. Made from pure vulcanized rubber, it offers superior resistance to oils and acids while maintaining exceptional comfort. With a total length of 145mm and a tapered thickness, it fits perfectly with original Seiko buckles (not included), making it the go-to replacement strap for discerning watch enthusiasts.




























| ASIN | B0DM5T1JLM |
| Best Sellers Rank | #1,267,369 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1,294 in Women's Watch Bands #2,629 in Men's Watch Bands |
| Customer Reviews | 3.8 3.8 out of 5 stars (34) |
| Date First Available | November 6, 2024 |
| Department | Unisex Adult |
| Manufacturer | CRAFTER BLUE |
D**E
Best rubber strap for the MM300
Fantastic strap, very well designed. Extremely comfortable. Fits the MM300 case and clasp perfectly. I love it
D**S
Awesome mm300 rubber strap!
Wanted a rubber strap and still utilize Seiko clasp from the OEM bracelet. This thing looks, fits and feels great and easy to install. Need to buy the orange one now!
S**.
Disappointing experience
Good quality and material and nice feeling on the wrist. My one and only complain that unfortunately kills the whole experience is the length. The short side of the band is too short so someone with a big wrist like me (8.25”) that will use full length, always has the clasp sideways. That could have been avoided if the short side was little longer, making the band easier to size
J**E
Great strap! Balances the watch very well!
Love how it fits and makes the watch feel. Takes the top heavy aspect of the marinemaster and makes it very wearable.
L**N
Fits perfectly
Quality is good and fits my husbands watch perfectly
A**R
Wouldn’t fit my SLA021
When I tried to attach to my MM300 SLA021 the strap wouldn’t fit close enough to the watch to allow the spring bars to go into the holes in my watch. In other words, the strap could not be attached to my watch and kept falling off. So this strap needs to be revised for better fitment. When I googled I found this is a common problem with this product.
B**Y
Comfortable and works great with OEM clasp
I like how well this strap is designed. It fits the MM300 perfectly. How well it looks and works with the MM300 clasp is just great. 100% satisfied with this purchase.
S**M
Good seller
Good seller, looked like a quality product but returned because the vanilla scent was too strong. I have an isophrane with the vanilla and it is fine, but for me the crafter blue was over the top on the vanilla. Returned without using with no issue.
M**T
Çok hafif ve saate çok hoş bi hava kattı.
A**E
Es una buena calidad, tiene buen volumen de extensible, los chinos son más delgados y tienen detalles de rebaba... considero un poco elevado el costo pero si vale la pena.
G**I
Great product and great service thank you
M**N
Terrible strap. Took ages to fit as the tolerances on the strap to the case are woeful, spring pinscrefused to seat. To add insult to injury, if you anything larger than a ladies wrist, the buckle sits way off centre. One positive, it looks nice and seems comfy for tge 30 seconds i had it on. Overall, poor for the money.
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