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Customer satisfaction is the value we exist for. We serve with sincerity, initiative, professionalism, efficiency and a human touch, targeting the highest possible customer satisfaction.
Insulation Sleeve Manufacturer · Yueqing, Zhejiang, China
Custom Electrical Insulation Sleeves
PVC, silicone and rubber in full material coverage — 12 series and 92 models in stock tooling. From sample-based production to tooling built from your drawings, we supply stable sleeve programmes for harness, electrical and automotive customers.
Product Center
View all seriesThe Full Sleeve Range
From terminal sleeves and end caps to battery terminal covers and matching brass terminals — sorted by material, wire range and mounting style, all available to custom drawings.
Terminal Sleeves
12 models available
End Caps
12 models available
Battery Covers
9 models available
Pipe-type Boots
12 models available
Tool Handle Grips
4 models available
Plastic Plugs
1 model available
Harness Boots
7 models available
Connector Housings
12 models available
Audio Harness Sleeves
2 models available
Fuse & Resistor Sleeves
2 models available
Bullet Terminal Sleeves
7 models available
Terminals
12 models available
Service
Plastic Sleeve Manufacturing Solutions
From technical support to after-sales response — end-to-end support for your programme.
Technical SupportTechnical Support
Strong technical resources and reliable production, inspection and test equipment, operating strictly to Chinese and international standards, with full monitoring from raw material to finished goods warehouse.
9yrs
Industry experience
10,000m²
Plant area
50+
Technical staff
10+
Certifications & awards
Why Qiyu
Quality as Character, Satisfaction as Standard
Strict service guarantees and a safe, dependable experience.
Product Know-how
A knowledgeable, responsive team available around the clock to answer detailed product questions.
Professional Team
An experienced and creative team backed by complete production and inspection equipment.
Proven Quality
A rigorous inspection team; products hold production licences, CCC certification and test reports.
After-sales Service
One-to-one support with one-minute response. Customer satisfaction is why we exist.
About Qiyu
About Qiyu
Yueqing Qiyu Electric Co., Ltd. is a dedicated manufacturer of insulation sleeves based in Liushi Town, Yueqing — the electrical components hub of Zhejiang. We supply plastic, silicone, rubber and PVC sleeves, terminal sleeves, end caps, wire and cable sleeves, handle grips, hardware fitting sleeves, automotive and motorcycle battery terminal covers, pneumatic dust caps, screw caps, wiring harness sleeves, eco-friendly, insulating, flame-retardant, high-temperature, waterproof and transparent sleeves, and the full 6.3 / 250 / 110 / 187 terminal sleeve range, bullet terminal sleeves and sealing plugs. Our plant runs purpose-built equipment for production, machining and custom work, and we welcome production from your samples or tooling built from your drawings.
- Moulding capability across plastic, silicone, rubber and PVC
- Production from your samples, or tooling built from your drawings
- Full quality monitoring from raw material to finished goods
- Manufactured to national and international standards, with test reports
News
All newsNews
Company news and industry insight.
20Oct
PVC: Properties and How to Specify a Sleeve
PVC is an amorphous thermoplastic polymerised from vinyl chloride — inherently flame-retardant and self-extinguishing, a good insulator, resistant to acids and alkalis, and inexpensive. It is the workhorse base material for sleeves. Its weakness is heat: ordinary grades are rated for continuous use only up to about 60 °C.
20Oct
Five Jobs an Insulation Sleeve Does in an Electrical Connection
A sleeve looks like a small plastic part, but it simultaneously provides electrical insulation, mechanical cushioning, sealing against dust and moisture, resistance to aggressive media, and circuit identification. Specify the wrong material or size and any one of those five fails — and becomes a hidden risk.
20Oct
PVC, Silicone or Rubber? Choosing a Sleeve Material
All three make good sleeves: PVC is cheap and flame-retardant, silicone has a very wide temperature range, and rubber excels in elasticity and oil resistance. The choice is not about which material is better — it is about operating temperature, contact media and assembly method.
14Oct
An Introduction to Silicone Material
Silicone is a highly active adsorbent material and an amorphous substance whose main component is silicon dioxide. It does not dissolve in water or any solvent, is non-toxic and odourless, and is chemically stable — reacting with nothing except strong alkalis and hydrofluoric acid.
14Oct
What Are the Advantages of Silicone Rubber?
Silicone rubber offers heat resistance, cold resistance, dielectric performance, ozone resistance and weathering resistance. Its standout property is a wide service temperature range — continuous use from -60 °C to +250 °C.