Generic Longines HydroConquest Rubber Strap 21mm (4 colors)

• Material: FKM fluoroelastomer – high temperature resistance, chemical resistance, UV resistance, excellent aging resistance, long service life.

• Size: 21mm width – fits the Longines HydroConquest 41mm case (lug spacing 21mm).

• Color options: 4 colors (e.g., black, blue, green, orange – check with seller).

• Water resistance: The rubber itself is non‑absorbent, suitable for swimming, diving and water sports.

• Comfort: Flexible, conforms to the wrist, more breathable than ordinary rubber, comfortable for all‑day wear.

• Durability: Tear‑resistant, abrasion‑resistant, not prone to aging or cracking.

• Clasp compatibility: Can be used with original folding clasp or a generic pin buckle (sold separately).

FAQ

Q1: Which is more durable, black or blue?
A: Both have the same durability. Black hides dirt and scratches better; blue offers a more vibrant look. Choice depends on personal preference and dial colour.

Q2: What is the difference between FKM rubber and ordinary silicone?
A: FKM fluoroelastomer has far better high‑temperature resistance, chemical resistance, and aging resistance than ordinary silicone. It does not absorb sweat or swell, making it more suitable for dive watches. However, it is more expensive.

Q3: Is a gap between the strap and case after installation normal?
A: A gap smaller than 0.5mm with no strap play is normal. If the gap is excessive or the strap wobbles, the spring bar may not be fully seated or the strap end may be mismatched. Reinstall or replace the spring bars.

Q4: Can I use the original folding clasp?
A: Yes. Most rubber straps have standard tail widths (approx. 18‑20mm) and are compatible with the original folding clasp. Simply attach the clasp‘s spring bars to the strap’s tail holes. Some straps may require adjustment or gasket washers.