Double Fish · No family · Inverted
Qi Ji
Qi Ji is one canonical identity; Qi-Ji, Qiji and QiJi are spelling variants of the same rubber. The romanised spelling differences never create a second record.
Also listed as: Qi-Ji · Qiji · QiJi · Double Fish Qi Ji
Specifications and evidence
Approval evidence and market availability are recorded separately. A name listed by an approval source is not proof that the rubber is currently on sale, and a rubber on sale is not proof of a current approval. Approval is never inherited by a suffix or edition, and no expiry date is invented.
Market status describes current commercial availability only. Where it could not be verified it stays unknown rather than being guessed from a shop listing.
Printed hardness values are manufacturer figures on the maker's own scale. A printed Chinese degree is not assumed to equal an ESN degree, and no hardness is inferred from a product code or a sponge colour.
No reliable official Double Fish list price is published per region, so no price is shown rather than an invented one.
TTDNA core profile
- Speed
- 79
- Spin
- 88
- Control
- 82
- Arc
- 57
- Hardness
- 52
- Tackiness
- 76
- Block
- 71
- Durability
- 70
TTDNA values are TTDNA's own editorial 0–100 ratings. They are not official Double Fish measurements, not laboratory data and not a conversion of any retailer score.
TTDNA ratings
TTDNA values are TTDNA's own editorial 0–100 ratings. They are not official Double Fish measurements, not laboratory data and not a conversion of any retailer score.
TTDNA ratings are normalized comparison values, not laboratory measurements. They are built from published specifications, technical sources and structured product evidence, converted to one 0–100 scale. Where a directly comparable measurement is unavailable, the value is an evidence-based estimate. Overall-style scores are composites of several characteristics. Methodology
Sources: Double Fish official product data · Retailer spec listings — weight, sponge hardness and thickness · TTDNA ratings — derived by TableTennisDNA, not manufacturer data
Data confidence
Variants and configurations
1 variantColour, thickness and configuration are variants of one model — never separate products. Colour never changes a rating, MAX and OX stay qualitative labels, and OX carries no sponge hardness.
Black · Red · Standard sheet range
Standard · Sponged · Medium (TTDNA band)
Speed 79 · Spin 88 · Control 82
Known users
Offensive club and league players who want a spin-first inverted sheet on the forehand or backhand.
Double Fish publishes no athlete roster for this sheet, so TTDNA shows the player profile it is built for instead of invented names.
20 Double Fish models in TTDNA · Compare the range